which one of the following is a class header indicating that we are defining a class named amphibian, which is derived from the animal class?

There is only one start codon, AUG. This means that all newly-made polypeptides have a methionine at their amino end.

A is the correct answer.

The first codon in the produced mRNA to undergo translation is the codon AUG, hence the name "START codon." Methionine (Met) in eukaryotes and formyl methionine (fMet) in prokaryotes are the amino acids that are coded by the most prevalent START codon, AUG.

The start (initiation) codon for synthesis is AUG, which also codes for the amino acid methionine in the conventional genetic code. A lengthy sequence of hundreds or thousands of codons that define the protein is typically found downstream of the AUG.

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The complete question is:

There is only one start codon, AUG. This means that

A. all newly-made polypeptides have a methionine at their amino end.

B. all newly-made polypeptides have a methionine at their carboxyl end.

C. the first tRNA will have the anticodon loop 3'-AUG-5'.

D. the 5' end of an mRNA must start with an A.

The codon GAA codes for the amino acid glutamic acid.

The next exposed codon on the messenger RNA (mRNA) is GAA, which codes for the amino acid glutamic acid. When the ribosome reads this codon, it will bring a transfer RNA (tRNA) molecule containing the complementary anticodon (CUU) and attached to the amino acid glutamic acid. This tRNA will bind to the ribosome and add the glutamic acid to the growing protein chain.

Therefore, the next amino acid that will be brought to the ribosome is glutamic acid.

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In this graphic representation of the pajamo study, the addition of lactose to the medium resulted in the resumption of the synthesis of β-galactosidase.

Lactose is a sugar that is naturally found in milk and milk products. It is a disaccharide composed of glucose and galactose, and is commonly referred to as milk sugar. Lactose plays an important role in the nutrition of young mammals, providing energy and promoting the growth and development of bones and tissues.

Lactose intolerance is a common condition where individuals lack the enzyme lactase, which is required to break down lactose into its component sugars for absorption in the small intestine. This can result in digestive symptoms such as bloating, gas, and diarrhea when consuming dairy products. Lactose is also commonly used in food manufacturing as a sweetener, texturizer, and bulking agent, and is added to a variety of processed foods such as baked goods, cereals, and snack foods.

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The use of antibiotic-resistance genes on plasmids has greatly facilitated genetic engineering and has become a common tool in molecular biology research. D) Direct selection possible.

When a plasmid with an antibiotic-resistance gene is introduced into a bacterial host cell, only the cells that take up the plasmid and express the antibiotic-resistance gene will survive in the presence of the antibiotic. This allows for direct selection of the transformed cells, as only those cells that have taken up the plasmid will survive.

Replica plating is a technique that involves transferring colonies from one plate to another in order to identify mutants or screen for specific phenotypes. The use of an antibiotic-resistance gene on a plasmid is not directly related to replica plating.

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In this simulation experiment, a resistant strain of E. coli was selected and grown using a process called selective pressure.

This involved exposing a population of E. coli to a specific antibiotic, in this case, ampicillin. As most of the bacteria were susceptible to ampicillin, they were killed off, leaving only those with a mutation that conferred resistance to the antibiotic. These resistant bacteria were then allowed to grow and reproduce, creating a new strain that was now resistant to ampicillin. This process was repeated several times to ensure the strain's stability and ability to resist the antibiotic effectively. Through this process of selective pressure, a resistant strain of E. coli was successfully developed, which could be used in further studies exploring antibiotic resistance.

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The list of dinosaurs collected from Mongolia, including the Late Cretaceous Flaming Cliffs locality, includes several species. Gallimimus, Velociraptor, Pinacosaurus, Mononykus, and Tarbosaurus are all correct.

Gallimimus was a fast-running, ostrich-like dinosaur that lived during the Late Cretaceous period. Velociraptor was a small, fast-moving predator with a sickle-shaped claw on each foot.

Pinacosaurus was an armored dinosaur that lived during the Late Cretaceous period. Mononykus was a small, bird-like dinosaur that had powerful arms and legs.

Tarbosaurus was a large, carnivorous dinosaur that lived during the Late Cretaceous period and was closely related to Tyrannosaurus rex.

These dinosaurs provide important clues about the evolution and diversity of life during the Late Cretaceous period in Mongolia and contribute to our understanding of the history of life on Earth.

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The frequency of the most prevalent genotype is the frequency of the genotype with the highest value in this list. In this case, the genotype with the highest frequency is CC, with a frequency of 0.36. Therefore, the answer is 0.36.

To determine the frequency of the most prevalent genotype in a one locus, three allele system with allele frequencies of 0.1, 0.3, and 0.6, we need to use the Hardy-Weinberg equilibrium equation.

The Hardy-Weinberg equation states that the frequency of each genotype in a population can be calculated from the frequencies of its constituent alleles. The equation is:

p^2 + 2pq + q^2 = 1

where p and q are the frequencies of the two alleles in the population, and p^2, 2pq, and q^2 are the frequencies of the three possible genotypes.

Given that we have three alleles in this system, we need to modify the equation slightly. Let's call the three alleles A, B, and C, with frequencies of 0.1, 0.3, and 0.6, respectively. The frequency of each genotype is then:

AA: p^2 = (0.1)^2 = 0.01
AB: 2pq = 2(0.1)(0.3) = 0.06
AC: 2pq = 2(0.1)(0.6) = 0.12
BB: p^2 = (0.3)^2 = 0.09
BC: 2pq = 2(0.3)(0.6) = 0.36
CC: p^2 = (0.6)^2 = 0.36

The frequency of the most prevalent genotype is the frequency of the genotype with the highest value in this list. In this case, the genotype with the highest frequency is CC, with a frequency of 0.36. Therefore, the answer is 0.36.

In summary, to determine the frequency of the most prevalent genotype in a one locus, three allele system, we need to use the Hardy-Weinberg equilibrium equation, taking into account the frequencies of each allele. The genotype with the highest frequency is the answer.

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Eliminating all the decomposers will result in the accumulation of waste, dead carcasses of various plants and animals, and litter. There will be an abundance of dead and rotting materials on the Earth as a result, which will cause a lack of open space.

Decomposers consume dead items, including wood and leaf litter from dead plants, animal corpses, and human waste. They are Earth's cleanup staff, and they do a great job. Dead leaves, dead insects, and dead animals would accumulate everywhere if decomposers weren't present. Just picture how the world might appear!

Decomposers are crucial to an ecosystem's stability because they recycle essential nutrients into the surrounding environment. The ecology as a whole would suffer if all the decomposers were eliminated because plants would run out of nutrients.

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One experimental modification that could effectively help to determine the sequence of reactions and reaction intermediates in the Calvin cycle is the use of isotopic labeling.

Specifically, incorporating radioactively labeled carbon dioxide (¹⁴CO₂) into the Calvin cycle can allow for the tracking of its movement through the pathway. By analyzing the labeled products at different time points, the order and rate of reactions, as well as the intermediates formed, can be deduced.

Additionally, measuring the incorporation of labeled CO₂ into specific metabolites or compounds can provide further insight into the function of enzymes and pathways involved in the Calvin cycle. This technique has been used in previous studies to elucidate the kinetics and regulation of the Calvin cycle in various plant species.

Thus, isotopic labeling can be a powerful tool in studying metabolic pathways such as the Calvin cycle and can provide valuable information for improving plant productivity and understanding carbon fixation in the environment.

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The cross section of the ear of corn in the FFA emblem represents unity, as the kernels are all united together in one ear. It also represents the importance of agriculture and the vital role that corn plays in the industry.

The emblem as a whole represents the FFA's mission to develop agricultural leadership and promote agricultural education.
                          The cross section of the ear of corn in the FFA emblem represents unity. The ear of corn is a symbol of common agricultural interests that bind together the diverse members of the organization. The FFA, or Future Farmers of America, uses this emblem to represent the values and goals that its members share.

In summary, the cross section of the ear of corn in the FFA emblem symbolizes the unity and common agricultural interests of the organization's members.

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In C. elegans, vulva development is characterized by the expression of specific cell fate patterns in the six vulval precursor cells (VPCs). In lag-2 loss-of-function mutants, these cell fate patterns are disrupted.

Here, correct option is C.

Specifically, the VPCs undergo a set of homeotic transformations, resulting in the formation of an extra vulval precursor cell (VPC7) and a reduction in the number of cells expressing the vulval fates. In other words, instead of all six VPCs expressing their appropriate vulval fates, only five do so.

This causes a disruption in the normal pattern of vulva formation, resulting in the formation of an extra VPC and the reduction in the number of cells expressing the vulval fates. This disruption is caused by the loss of lag-2 function, which is necessary for the expression of cell fate patterns in the VPCs.

Therefore, correct option is C.

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complete question is :

During vulva development in c. Elegans, which cell fate pattern will the six vpcs display in lag-2 loss-of-function mutants?.

A. loss of mutation

B. loss of gene

C. loss-of-function mutants

D. NONE

Earthquakes are the result of the sudden release of energy stored in the Earth's crust. This energy can be released in various ways, such as the movement of tectonic plates, volcanic activity, or human activities such as mining and drilling.

Tectonic plates are large pieces of the Earth's crust that move around due to convection currents in the mantle. The movement of these plates can cause them to collide or slide past each other, which can create stress in the surrounding rock.

In the case of the historic earthquakes in New Madrid, Missouri, the cause was the movement of the North American Plate and the Mississippi Embayment. The North American Plate is slowly moving westward, while the Mississippi Embayment is sinking due to the weight of sediment deposited by the Mississippi River.

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Oxidative phase does not require oxygen is the glycolysis phase. Glycolysis is the first stage of cellular respiration, which is a metabolic process that converts glucose into ATP (adenosine triphosphate) in the presence of oxygen.

However, glycolysis can occur in the absence of oxygen, a process called anaerobic respiration. In this case, instead of the pyruvate molecules produced by glycolysis being oxidized by the Krebs cycle and the electron transport chain, they are converted into other compounds, such as lactic acid or ethanol, which can be used as an energy source.

While anaerobic respiration does not produce as much ATP as aerobic respiration, it is still an important energy-generating process for cells that are unable to access oxygen, such as muscle cells during strenuous exercise. In summary, glycolysis is the oxidative phase that does not require oxygen, and it is a crucial process for the generation of energy in the absence of oxygen.

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The traditional phenotypic approach to bacterial identification includes the following examples: Gram stain morphology, Antigen-antibody reactions, Ability to ferment glucose and Growth and colony morphology on differential media

Options A, B, C & D are correct.

PCR is not a traditional phenotypic approach to bacterial identification, as it relies on detecting the presence of specific DNA sequences rather than physical characteristics of the bacteria. The other options listed are traditional phenotypic approaches that rely on visual or biochemical features of the bacteria, such as their appearance under a microscope (Gram stain), their ability to metabolize specific nutrients (ferment glucose), or their growth and appearance on specialized media (differential media).

Antigen-antibody reactions are also a traditional approach, used to detect specific proteins or other molecules on the surface of bacteria that can be used to identify them.

Therefore, the correct options are A, B, C & D.

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The primary germ layer that gave rise to the cells that eventually became the central nervous system is the ectoderm.

During embryonic development, the cells of the ectoderm differentiate into neural plate cells which then fold to form the neural tube, the precursor to the brain and spinal cord. This process is known as neurulation.

The ectoderm also gives rise to other important structures such as the epidermis, hair, nails, and sensory organs such as the eyes and ears. The mesoderm and endoderm are the other two primary germ layers that form during embryonic development.

The mesoderm gives rise to structures such as muscle, bone, and the cardiovascular system. The endoderm forms the lining of the digestive and respiratory systems.

Understanding the three primary germ layers and their derivatives is crucial for understanding the development and function of the human body. Defects or abnormalities during embryonic development can lead to a wide range of congenital disorders and diseases.

Studying the complex processes involved in embryonic development can also provide insights into potential therapies for such conditions.

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The layer of the meninges that closely follows every gyrus and sulcus is the pia mater.

To explain in more detail, the meninges are the three protective membranes that surround the brain and spinal cord. The pia mater is the innermost layer and is in direct contact with the brain and spinal cord. It is a delicate layer that closely follows the contours of the brain's surface, including the gyri (ridges) and sulci (grooves). The pia mater provides nourishment to the brain and helps protect it from injury.

The layer of the meninges that closely follows every gyrus and sulcus is the pia mater. In detail, the pia mater is the innermost layer of the meninges, which directly covers the surface of the brain, following its contours including the gyri and sulci. This layer helps protect and nourish the brain.

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Factors that affect enzyme activity include:

1. Temperature: Enzymes work best at a specific temperature range. At high temperatures, enzymes can become denatured and lose their activity.

2. pH: Enzymes have an optimal pH at which they work best. Deviations from this pH can affect their activity.

3. Substrate concentration: As substrate concentration increases, enzyme activity increases up to a point, after which it plateaus.

4. Enzyme concentration: As enzyme concentration increases, enzyme activity increases up to a point, after which it plateaus.

5. Presence of cofactors: Many enzymes require cofactors, such as metal ions or coenzymes, to function.

Modes of enzyme inhibition:

1. Competitive inhibition: In competitive inhibition, an inhibitor molecule binds to the active site of an enzyme, preventing the substrate from binding. This can be overcome by increasing substrate concentration.

2. Noncompetitive inhibition: In noncompetitive inhibition, an inhibitor molecule binds to a site on the enzyme other than the active site, causing a conformational change that prevents the substrate from binding.

3. Uncompetitive inhibition: In uncompetitive inhibition, an inhibitor molecule binds to the enzyme-substrate complex, preventing the reaction from proceeding.

4. Mixed inhibition: In mixed inhibition, an inhibitor molecule can bind to both the enzyme and the enzyme-substrate complex, affecting the enzyme's activity.

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The fact that the species ursus arctos, ursus maritimus, and ursus americanus are all members of the same genus implies that they share some common characteristics and ancestry.

They belong to the genus Ursus, which is a group of mammals commonly known as bears. These three species have some physical and behavioral similarities that are distinctive of the Ursus genus. They are all large mammals with powerful bodies and sharp claws that enable them to hunt and defend themselves. Also, they have a similar diet, feeding on meat, fish, and vegetation. However, despite their similarities, the three species have different adaptations that allow them to thrive in their unique environments. Ursus arctos, for instance, is commonly found in forests, while Ursus maritimus is adapted to live in cold Arctic environments. Ursus americanus, on the other hand, is commonly found in North American forests. Therefore, the classification of these species supports the idea that they are related but have distinct differences that enable them to survive in their respective habitats.

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The vestibular apparatus is responsible for detecting changes in head position and movement, as well as changes in the body's orientation with respect to gravity. It responds to stimuli such as rotational and linear acceleration, changes in gravitational forces, and changes in head position.

This information is processed by the brain to help maintain balance and spatial orientation.

The vestibular apparatus detects changes in head position and movement. It primarily senses linear acceleration, angular acceleration, and gravitational forces. The vestibular apparatus is composed of three semicircular canals and the otolithic organs, which are the utricle and saccule. These structures work together to provide information about balance and spatial orientation to the brain.

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If hares moved faster and were thus harder for lynx to capture, the rate that would change in the Lotka-Volterra predator-prey model is the capture rate, which is represented by the parameter "β" (beta).

The Lotka-Volterra predator-prey model is a set of two differential equations that describe the interaction between a predator population (lynx) and a prey population (hares). The model can be represented as follows:

dx/dt = αx - βxy
dy/dt = δxy - γy

Here, x represents the prey population (hares), and y represents the predator population (lynx). The parameters are:

- α (alpha): Prey reproduction rate
- β (beta): Capture rate, which describes the rate at which predators capture prey
- δ (delta): Conversion efficiency, which describes how efficiently predators convert consumed prey into offspring
- γ (gamma): Predator death rate

As hares move faster, making them harder to capture, the capture rate (β) would decrease, reflecting the lower probability of lynx successfully capturing hares in the model.

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The fossil is approximately 12,000 years old. To determine the age , we use the information about its carbon-14 (C-14) level and the half-life of C-14.

Based on the given information, we can use the formula for exponential decay to determine the age of the fossil. Carbon-14 undergoes radioactive decay at a constant rate, which is why its half-life can be used as a measure of time. If the carbon-14 level in the fossil is 40% that of living organisms, it means that only 40% of the original carbon-14 is present.

To solve for the age of the fossil, we can use the following equation:
(0.40) = [tex]\frac{1}{2}^{t/5730} }[/tex]

where t is the age of the fossil in years.

Solving for t, we get:
t = (5730) x ㏑(0.40) / ㏑(1/2)
t ≈ 12,000 years

Therefore, the fossil is approximately 12,000 years old.

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Mutant that results in the production of an enzyme with a higher affinity for glucose: This mutant is likely to increase the rate of glycolysis in liver cells. With a higher affinity for glucose, the enzyme will more readily bind to glucose and convert it to glucose-6-phosphate, which is the first step in glycolysis. This means that more glucose will be converted to pyruvate, which will result in an increase in the rate of glycolysis.

Mutant that results in the production of an enzyme with a lower affinity for glucose: This mutant is likely to decrease the rate of glycolysis in liver cells. With a lower affinity for glucose, the enzyme will bind to glucose less readily and may even compete with other enzymes for the same substrate. This will result in less glucose being converted to glucose-6-phosphate and a decrease in the rate of glycolysis.

Mutant that results in the production of an enzyme with a higher activity level: This mutant is likely to increase the rate of glycolysis in liver cells. With a higher activity level, the enzyme will catalyze the conversion of glucose to glucose-6-phosphate more quickly, resulting in more glucose being converted to pyruvate and an increase in the rate of glycolysis.

Mutant that results in the production of an enzyme with a lower activity level: This mutant is likely to decrease the rate of glycolysis in liver cells. With a lower activity level, the enzyme will catalyze the conversion of glucose to glucose-6-phosphate more slowly, resulting in less glucose being converted to pyruvate and a decrease in the rate of glycolysis.

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The main answer to your question is that nociceptors are responsible for the sensation of pain caused by hot coffee spilled on the skin. Nociceptors are specialized sensory receptors that respond to tissue damage or potential tissue damage, such as extreme temperatures. When they are activated, they send signals to the brain, which are interpreted as pain.

To provide further explanation, nociceptors are found in various tissues throughout the body, including the skin, and are responsible for detecting and responding to painful stimuli.

In the case of hot coffee spilled on the skin, the high temperature activates the nociceptors in the affected area, which sends signals to the brain indicating tissue damage, resulting in the perception of pain.

In summary, the sensation of pain caused by hot coffee spilled on the skin is due to the activation of nociceptors, specialized sensory receptors that respond to tissue damage or potential tissue damage.

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"Phagocytosis" is the medical word for ingestion foreign particles or germs that neutrophils are unable to process. The buildup of these particles or bacteria can result in the creation of an abscess or other forms of inflammatory reaction when the neutrophils are unable to breakdown the ingested material.

An essential function of the immune system is phagocytosis. The immune system uses a variety of cells, including neutrophils, macrophages, dendritic cells, and B lymphocytes, to carry out phagocytosis.

Immune system cells can identify the pathogens or foreign objects they are battling by phagocytosing them. The neutrophils' ability to kill microbes relies heavily on phagocytosis. Pathogens are initially taken up by the phagosome, a plasma membrane-derived vacuole that continues to grow.

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Correct Question:

What is the medical term for ingest foreign particles or bacteria that the neutrophils are unable to digest?

Animal Crossing is a life simulation game where players live in a village with a variety of animals as their neighbors. The communicator parts are an essential component of the game that allow players to interact with other players locally or online. In order to use the communicator parts, players need to have a Nintendo DS, Wii or 3DS console, and a Wi-Fi connection.

In Animal Crossing: Wild World for the Nintendo DS, the communicator parts are called "Friend Codes" which are unique numbers that players can exchange to become friends and visit each other's towns. In Animal Crossing: City Folk for the Wii, players use "Friend Codes" as well as Wii Speak, a microphone that allows players to chat with each other while playing the game.

In Animal Crossing: New Leaf for the 3DS, players use the Nintendo 3DS system's built-in wireless communication to visit other players' towns and interact with them in various ways. Additionally, players can use the "Dream Suite" feature to visit dream versions of other players' towns, without actually having to connect with other players in real-time.

Overall, the communicator parts in Animal Crossing are an important feature that allows players to connect with other players and have a more immersive gaming experience.

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Answer:

The autonomic nervous system

Explanation:

autonomic nervous system regulates the activity of involuntary actions, such as cardiac muscle, smooth muscle and glands.

The role of the pathway that includes GALT is to alter galactose, allowing the resulting metabolites to enter glycolysis. It also produces galactose from lactose.

The pathway involving GALT plays a crucial role in the metabolism of galactose, a sugar commonly found in milk and dairy products. This pathway is essential because it converts galactose into glucose-1-phosphate, which can then enter glycolysis for energy production. GALT catalyzes the transfer of a uridine monophosphate (UMP) group from uridine diphosphate (UDP)-glucose to galactose-1-phosphate, producing UDP-galactose and glucose-1-phosphate. Additionally, this pathway is responsible for the production of galactose from lactose, which is a disaccharide sugar made of glucose and galactose. In summary, the GALT pathway ensures the efficient utilization of galactose for energy production and maintenance of cellular processes.

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The end product of anaerobic glycolysis in erythrocytes is lactate. Erythrocytes, commonly known as red blood cells, lack mitochondria and therefore cannot carry out oxidative phosphorylation, which is the process of ATP production in the presence of oxygen.

Erythrocytes, commonly known as red blood cells, lack mitochondria and therefore cannot carry out oxidative phosphorylation, which is the process of ATP production in the presence of oxygen. Instead, they rely on anaerobic glycolysis to generate ATP. In this process, glucose is broken down into two molecules of pyruvate, which is then converted into lactate in the absence of oxygen. Lactate is then released into the bloodstream and transported to the liver, where it is converted back into glucose through the process of gluconeogenesis. This glucose can then be used by other cells in the body to generate ATP through oxidative phosphorylation.

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The MMR (mismatch repair) system is responsible for correcting errors that may occur during DNA replication. It identifies mismatches between the two strands of DNA and corrects them by excising the incorrect base(s) and replacing them with the correct one(s).

The correct nucleotide pairing recognized by the MMR system during DNA replication are:

Therefore, option C (I and II only) is the correct answer. Option III (dAMP and dTMP) is incorrect because the correct pairing is dTMP and dAMP, as mentioned above. Option A (I only) and option D (I, II, and III) are also incorrect.

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An example of codominant inheritance in humans is the ABO blood group system.

The ABO blood group is determined by three alleles: A, B, and O. A and B alleles are codominant, meaning that if an individual has both A and B alleles, they will express both phenotypes equally.

Individuals who have two copies of the A allele (AA) have type A blood, individuals with two copies of the B allele (BB) have type B blood, and individuals with one copy of each (AB) have type AB blood.

Individuals who have two copies of the O allele (OO) have type O blood, which is considered the "universal donor" because it does not express any antigens that can trigger an immune response.

The A and B alleles are expressed equally in individuals who have both alleles. This means that the blood type of an individual with the AB genotype reflects the expression of both A and B alleles, rather than a blending of the two phenotypes.

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