A female fly that has miniature wings and sepia eyes is crossed with a male that has normal wings and is homozygous for red eyes. The F1 are intercrossed to produce the F2. Give the phenotypes and their proportions expected in the F1 and F2 flies from this cross.
Answer and Explanation:
The gene that expresses the size of the wing is X-linked. The dominant allele expresses long wings, XM, while the recessive allele expresses miniature wings, Xm. The gene that expresses the color of the eyes is autosomal. The dominant allele expresses red color, S, and the recessive allele expresses sepia color, s.A female fly that has miniature wings and sepia eyes (XmXm ss) is crossed with a male that has normal wings and is homozygous for red eyes (XMY SS).
The F1 are intercrossed to produce the F2.
1º Cross:
Parental) XmXm ss x XMY SS
Gametes) Xms Xms Xms Xms
XMS XMS YS YS
Punnet Square) Xms Xms Xms Xms
XMS XMXmSs XMXmSs XMXmSs XMXmSs
XMS XMXmSs XMXmSs XMXmSs XMXmSs
YS XmY Ss XmY Ss XmY Ss XmY Ss
YS XmY Ss XmY Ss XmY Ss XmY Ss
F1) 1/2 or 50% of the progeny are females and the other 1/2 or 50% are males
100% of the females (1/2 or 50% of the progeny) are long-winged and red-eyed
100% of the males (1/2 or 50% of the progeny) are miniature.winged and red-eyed.
2º Cross:
Parental) XMXm Ss x XmY Ss
Gametes) XMS XMs XmS Xms
XmS Xms YS Ys
Punnet Square) XMS XMs XmS Xms
XmS XMXm SS XMXm Ss XmXm SS XmXm Ss
Xms XMXm Ss XMXm ss XmXm Ss XmXm ss
YS XMY SS XMY Ss XmY SS XmY Ss
Ys XMY Ss XMY ss XmY Ss XmY ss
F2) 8/16=4/8=1/2 or 50% of the progeny are females and the other 1/2 or 50% are males
Females (8/16):
3/8 of the females are long-winged and red-eyed, XMX- S-1/8 of the females are long-winged and sepia-eyed, XMX- ss3/8 of the females are miniature-winged and red-eyed, XmXm S-1/8 of the females are miniature-winged and sepia-eyed, XmXm ssMales (8/16):
3/8 of the males are long-winged and red-eyed, XMY S-1/8 of the males are long-winged and sepia-eyed, XMY ss3/8 of the males are miniature-winged and red-eyed, XmY S-1/8 of the males are miniature-winged and sepia-eyed, XmY ssNote: The symbol "-" means that in its place might be a recessive allele or a dominant allele. For example, S- means that it might be SS or Ss.
which fungi group is known as the zygote fungi and produces spores in zygos[orangia?
Answer:
zygomcota
Explanation:
discovered in Winter 1881
What impact does the atmosphere have on the Earth's cycles? Select four options,
produces wind currents
transfers nitrogen from air to soil
transfers water into Earth's oceans
moves oxygen from volcanic eruptions for plants
moves oxygen and carbon dioxide through the biosphere?
Answer:
D
Explanation:
I think the atmosphere facilitates the distribution of oxygen and co2
Answer:
D
Explanation:
2. Is salt water alkaline or acidic?
Answer: hh
Explanation:hhh
If a 160lb individual has 28% body fat how much of their body weight is fat in lbs.?
Answer:
44.8 lb
Explanation:
160 lb * 0.28= 44.8 lb
Answer:
44.8 lb
Explanation:
160 x 0.28 = 44.8
2.Black fur(B) in guinea pigs is dominant over white fur(b). Find theprobability of an offspring with the same phenotype as its parents in across between a homozygous black and a heterozygous black guineapig
.A. 0%,
25%B.25%,
25%C.50%,50%
D.75%, 25%
E.100%, 0%
Answer:
Option d: black 75%, white 25%
Explanation:
The cross is between a homozygous black and a heterozygous black guinea pig
Parents gen. BB x Bb
F1 generation BB Bb Bb bb
The probability of an offspring with the same phenotype as its parents is
Genotype: BB - 25% and Bb - 50%, bb-25%
Phenotype: black 75%, white 25%
Which of the following are true?
1. Random Fertilization means that any one sperm may fertilize any one egg as a chance event.
II. Random fertilization allows for a lot of diversity in offspring.
III. Crossing over and independent assortment do NOT affect the diversity of offspring produced
by random fertilization.
Select one:
o
a. I and III
b. II and III
c. I, II, and III
d. I and II
Answer:
1 and 2
Explanation: Random Fertilization means that any one sperm may fertilize any one egg as a chance event.
Random fertilization allows for a lot of diversity in offspring.
Random Fertilization means that any one sperm may fertilize any one egg as a chance event and allows for a lot of diversity in offspring. So, the correct option is (D).
What is Random Fertilization?Random fertilization refers to random mating. In this, during sexual reproduction, male gametes and female gametes which fuse to produce offspring are randomly selected from the pool of male and female gametes.
Random fertilization increases genetic diversity. When a male gamete and a female gamete finally meet which results in a large number of genetic possibilities built up during independent assortment and crossing over.
The example of Random Fertilization is when the two individuals mate, where each is capable of producing more than 8 million potential gametes, then the random probability of any one sperm and egg coming together showing 70 trillion different combinations.
Thus, Random Fertilization means that any one sperm may fertilize any one egg as a chance event and allows for a lot of diversity in offspring. So, the correct option is (D).
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Some parts of the worlds rainforests haven’t been studied closely, and may contain species of plants which have benefits for humans. ‘Suggest and explain uses of stem cells taken from the meristem of a new species of plant.’
To determine the similarity of stem cells of one species of plant with that of another: By determining the similarity between the stem cells taken from two different species, it can be identified whether there is a possibility of clowning, of giving birth to new and improved species of plants that are beneficial for mankind, or that of interchanging the stem cells to boost up or slow down the growth of the plants. To determine whether the stem cells can be altered and reintroduced to make the plants grow in a specified manner: By altering and modifying the stem cells and reintroducing them back again, it is possible to restrict the growth of the plant to a specific size or shape. This trait of the stem cells can be used to make the plantation possible in compact areas as well as to grow the plants in the desired shapes.
To determine whether the speed of division of cells at the roots and appendages of the plant can be modified: By restricting or boosting the speed of the division of meristem cells using modified stem cells, the plant can be made to grow faster in a specific season and slower in another. This feature can be used to lower the vulnerability of the plant species towards various natural weathering actions.
Stem cells extracted from the meristem can be precisely examined for their effectiveness against illnesses that harm portions of the plants such as the roots, shoots, and appendages to ascertain the resistance against various plant diseases.
What is meristem?They can thus also be utilized to rebuild the damaged plant tissues if the newly discovered species becomes extinct.
It can be determined whether there is a chance of clowning, or of giving birth to new and improved species of plants that are beneficial to mankind.
Therefore, Stem cells extracted from the meristem can be precisely examined for their effectiveness against illnesses that harm portions of the plants such as the roots, shoots, and appendages to ascertain the resistance against various plant diseases.
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Which statement describes a feature of equal are projection?
Option C
Latitude lines meet at the poles.
Explanation:
Several equivalent projections were developed in an attempt to minimize the distortion of countries and continents of planet Earth,keeping the area constant.
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Answer:
c
Explanation:
i did it already
In his experiments with different competing pairs of Paramecium species, Gause found that sometimes both species persisted and sometimes only one species did. Which hypothesis did Gause propose in order to explain the cases in which both species persisted?
Answer: The options are not given, here are the options.
A. One species is much better competitor than the other.
B. Periodic disturbances allow for coexistence.
C. Two species tended to use different resources.
D. The two species experienced interference competition and not exploitative competition.
The correct option C.
Two species tended to use different resources.
Explanation:
From Gause experiments on competing paramecium pairs, He found out that most times both species persisted and sometimes only one did because the two species uses different resources.
Organisms normally compete for limited resources in order to survive and one intend to compete well while other suffer. Both in the case of competing paramecium pairs, the pair use different resources which make the to persist and survive well. Once the resource of one finishes, the other one will persist because it is still surviving on its available resources.
Sensory information from proprioceptors about joint and muscle positions are carried to the brain by the: Sensory information from proprioceptors about joint and muscle positions are carried to the brain by the: anterolateral system (spinothalamic tracts). vestibulospinal tract. reticulospinal tract. spinocerebellar tracts.
Answer:
Spinocerebellar tracts.
Explanation:
Spinocerebellar tracts are afferent neurons that transmit proprioceptive information from the peripheral nervous system ( muscles and joints propricetors) to the cerebellum. It originated from the spinal cord and end at the cerebellum. It carry unconscious proprioceptive sensory information from the muscles, organs to the cerebellum.
(e) Predict the effect of the removal of the final electron acceptor on the rate of carbon fixation by the chloroplast. Justify your prediction
Answer:
The ATPs produced during Chemeiosmosis, in the chloroplast is needed during Calvin cycle to fix carbon for production of CHO, protein and fats during conversion of 3C-glyceride phosphate(GP) to 2C- triose phosphate.(TP) .
The ATPs is needed for this reduction to take place in the presence of NADPH(which is oxdized to NADP).
Therefore, if the final electron acceptor is removed, there will be no electron transport chains which generated the PMF, for pumping H+ across into the thylakoid membrane of the chloroplast, to generate the electrochemical gradients, needed for the energy for ATPase synthase enzymes,to synthesize ATPs production.
Therefore, the removal of the electron acceptor (oxygen) leads to stoppage of electron transport chain, and hence loss of ATP s, and therefore, no Carbon fixation as CHO, or protein, or fats.
Explanation:
The same sentences are written with a substitution, deletion, or insertion, much as a gene may have a substitution, deletion, or insertion mutation. Identify which sentence represents a substitution, which represents a deletion, and which represents an insertion.
Answer:
The question is incomplete, the complete question has been added as an attachment.
THE DGR AN represents deletion mutation
THE RED ANA TRA N represents insertion mutation
THE FOX WTS RED represents substitution mutation
Explanation:
Mutation is a change in the nucleotide sequence of a gene. It can be of different types depending on how it occurs. A deletion mutation is that which involves the removal of one or more nucleotide base from the sequence.
An insertion mutation is the addition of one or more nucleotide bases to the sequence.
A substitution mutation is the replacement of one or more nucleotide base in a sequence.
The original sentences were:
1. THE RED ANT RAN
2. THE FOX WAS RED
3. THE DOG RAN
The three sentences that mutated/changed are:
1. THE DGR AN- in this sentence, letter O which represents one base is missing due to removal, making the original sentence (THE DOG RAN) alterated. Hence, this represents an example of deletion mutation.
2. THE RED ANA TRA N - in this case, Letter A has been added in between N and T. This makes the original sentence (THE RED ANT RAN) altered. Since addition of letter (base) occurred, this represents an example of insertion mutation.
3. THE FOX WTS RED - In this case, letter A in "WAS" was replaced by T, making the original sentence (THE FOX WAS RED) altered. Since a replacement of letter (base) is the case here, it represents an example of substitution mutation.
carbohydrates are used for what
Carbohydrates are used for short term energy. It also stores energy.
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Function of carbohydrates
Carbohydrates provide fuel for the central nervous system and energy for working muscles. They also prevent protein from being used as an energy source and enable fat metabolism, according to Iowa State University. Also, "carbohydrates are important for brain function," Smathers said.
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You want to estimate the number of canvas backs (a type of duck) at the Sacramento Wildlife Refuge. In two days you capture 200 canvas backs, mark all of them and release them. One month later you capture another 200 canvas backs, of which 100 were marked by you last month. Calculate an estimate for the population size of canvas backs.
A. 400
B. 100
C. 200
D. 300
E. 600
Answer:
Option A 400 individuals
Explanation:
Using this formula, we can estimate the population size of the canvas backs as this is a capture-recapture method.
N = (MxC) / R
Where N = estimated Number of individuals in the population
M = number of individuals captured and Marked = 200
C = total number Captured the second time (with and without a mark) = 200 and
R= number of individuals Recaptured (those with a mark) = 100
Thus, we have
N = (MxC) / R
= (200 x 200) / 100
= (40,000) / 100
= 400 individuals.
Match the terms to their definition.
the number of individual organisms born into a population in a given year
the movement of individuals out of a population
the number of individual organisms that die in a population in a given year
the movement of individuals into a population
Answer:
Birth rate: the number of individual organisms born into a population in a given year
Emigration: the movement of individuals out of a population
Death rate: the number of individual organisms that die in a population in a given year
Immigration: the movement of individuals into a population
Matching these definitions to their appropriate terms
Birth rate The number of individual organisms born into a population in a given yearEmigration: The movement of individuals out of a populationDeath rate : The number of individual organisms that die in a population in a given year. Immigration : The movement of individuals into a populationIndividual organisms enter a population either by immigration or by birth while individual organisms leave a population by either emigration or death. While the general term used to describe the movement of individuals in and out of a population is migration.
Death rate is number of deaths that occurs in a particular population over a period ( usually 1 year ) while Birth rate is the number of births that occurs in a population over a period as well.
Hence we can conclude that the terms matching each description as mentioned in the question are , Birth Rate, Emigration, Death rate and immigration.
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n
In order to extend the civil rights of slaves after the Civil War, the United States
banned slavery with the Fourteenth Amendment and created new protections with the Thir
banned slavery with the Fifteenth Amendment and created new protections with the Thirtee
banned slavery with the Thirteenth Amendment and created new protections with the Fourt
banned slavery with the Fourteenth Amendment and created new protections with the Fiftes
Answer:
C. banned slavery with the Thirteenth Amendment and created new protections with the Fourteenth Amendment.
Explanation:
e2021
The 14th Amendment to the U.S. Constitution, ratified in 1868, promised “equal protection of the laws” to all citizens, including former slaves, and extended citizenship to anybody born or naturalized in the country. Thus, option C is correct.
What is the civil war?War between established parties within the same state is known as an intrastate conflict or civil war (or country).
One side's objective may be to seize power in the nation or a specific area, secure regional independence, or alter governmental practices.
One of their allegations was that the Farm was operated in violation of the 13th Amendment, which forbids “slavery or involuntary servitude, except as a punishment for crime,” since it amounted to slavery.
Therefore, banned slavery with the Thirteenth Amendment and created new protections with the Fourteenth Amendment.
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One of the three amendments to abolish slavery that were approved during the Reconstruction era.
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I will give 55 points to answers this correctly!
The tometti fossils are most related to?.......
Answer:
the tometti fossil are most related to ostriches or to crocodiles.
List 3 areas other than pregnancy and childbirth where genetic counselors provide help.
Some theories are developed from repeated testing of a single hypothesis. Cell theory, germ theory, and the theory of evolution all have developed from the testing of multiple related hypotheses. Which statement best explains why some theories develop this way?
Answer:
Each experiment reveals a different piece of information that is needed to develop the theory.
Explanation:
Answer:
Each experiment reveals a different piece of information that is needed to develop the theory.
Explanation:
Why does the growth of dodder eventually lead to the death of a host plant?
Answer:
it deprives the plant of nutrients
Explanation:
Which statement best describes the phases of the Moon?
•During the waxing and waning phases of the Moon, the amount of light received by the Sun changes.
•During the waning phase of the Moon, less of the Moon's near side is lít each night
•During the waxing phase of the Moon, less of the Moon's near side is lit each night.
•During both the waxing and waning phases, the Moon is not visible to people on Earth
Answer:
During the waning phase of the Moon, less of the Moon's near side is lít each night
Explanation:
Phases of the moon are different ways the moon appear on the Earth. As moon orbit the Earth, half of the moon that faces the Earth will be lit up. There are different phases of moon which are full moon, quarter moon, waning crescent moon, waning gibbous moon, e.t.c.
A waxing crescent moon is when the moon look like crescent and it increases in size.
A waning gibbous moon occurs when more than half of the lit portion of the Moon can be seen and the shape reduce in size . It occur between the full and quarter moon.
Answer:
Explanation:
The night sky with a small sliver of the left side of the moon visible.
In this photo, this phase of the moon is called
.
The next phase will be
.
About 27 days from now the phase will be
.
which is it ????
what type of epithelium has dome shaped on the apical surface?
Answer:
Transitional epithelium has dome shaped cells on the apical surface.
Answer:
Transitional epithelium
Transitional epithelium has dome shaped cells on the apical surface. Pseudostratified epithelium is a type of epithelium that has cells which all touch the basement membrane. Pseudostratified epithelium is only one cell layer thick.
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Explanation:
24. Explain why water shortages occur frequently in
parts of New York State even though the water
supply is nearly constant. [1]
Answer:
Water is an essential element of life. Water is life and it has a lot of functions such as for drinking and other domestic purposes. There could however be water shortage in some parts of Nee York states as a result of country as a result of the effects of drought due to low amount of rainfall in the area.
There may also be issues with the various instruments which helps in the transport of water to homes which could also lead to the shortage.
Shortages occur frequently in parts of New York State even though the water supply is nearly constant as there are some issues with the water transport system and also low rainfall in some areas.
What is the way of water transportation?There can be several methods by which water transportation can be made easy.
Methods of transportation are included under three categories:
Aqueducts: it involves pipelines, canals, tunnels and bridges. Container shipment: it involves tank truck, tank car, and tank ship. Towing: it includes a tugboat is used to pull an iceberg or a large water bag along behind it.Shortages occur frequently in parts of New York State even though the water supply is nearly constant as there are some issues with the water transport system and also low rainfall in some areas.
Thus, this can be the reason behind water shortage in New York.
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1. An oak tree is adapted to grow in a wood. Which of the following is NOT
true?
A)It has a large root system to absorb water and minerals
B)It has a large root system to anchod the tree
C)It has plenty of leaves to absorb sunlight
D)It loses its leaves in autumn to save food
Answer:
(B) it has a large root system to anchored the tree
What effect does the sun have on surface water?
Answer:
it evaporates it and makes the water cycle work
Explanation:
The sun has several effects on surface water. It causes evaporation, converting water into vapor and contributing to the water cycle.
The effect of tghe sunThe sun's heat regulates water temperature and supports photosynthesis in aquatic plants, which produce oxygen and serve as food sources.
Solar energy drives surface water circulation and influences biological activity, promoting biodiversity in water bodies.
Overall, the sun plays a vital role in the dynamics and functioning of aquatic ecosystems.
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Multiple alleles____ can interact how with traits
A student is given a list of traits and is asked to organize them in a Venn diagram as shown below.
Inherited Both Acquired
Traits
Wolf's social status
Tiger's stripes
Blood type A
A scar
Skin color
Musical talent
-
III
Q
Which traits should the student put in section II (Both)?
O a scar and blood type
tiger's stripes and wolf's social status
musical talent and wolf's social status
musical talent and skin color
Answer: a scar and wolf's social status
Explanation:
The acquired traits can be defined as the traits, which are only influenced by the environment of the organism. The acquired trait cannot be passed down to the offspring, as they are not genetically determined. A scar and the social status of any organism is dependent on the behavior of the organism to the environment, no genes code for both of these characters. So, scars and Wolf's social status is an acquired trait.
The trait that should be put in section II (Both) is "a scar", as scars can be acquired due to injury or trauma, but some people may also have a genetic predisposition to scarring.
What are inherited and acquired trait?Inherited traits are characteristics that are determined by an individual's genetic makeup and are passed down from parents to their offspring through the process of reproduction. Examples of inherited traits include eye color, hair color, blood type, and facial features.
Acquired traits are characteristics that are developed during an individual's lifetime as a result of their interactions with the environment. Examples of acquired traits include scars, calluses, tanned skin, learned behaviors, and language proficiency.
While some traits may be either entirely inherited or acquired, many traits are influenced by both genetic and environmental factors. The complex interplay between nature and nurture contributes to the vast diversity of traits and characteristics found within the human population.
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Some fish have bony fins. If the body of water they are in dries out, these fins can be used to help the fish "walk" to another body of water. In this context, bony fins are an example of ________. A) an exaptation B) an adaptation C) a macroevolutionary event D) pedomorphosis
Answer:
A) an exaptation
Explanation:
Look at the ocean system described below.
plankton
herring
octopus
shark
What will most likely happen to this ecosystem if the herring are killed by a
virus?
A. The shark population will increase.
B. The plankton will die off over time.
C. The octopus population will increase.
D. The octopus and shark populations will decline.
Answer:
I think the ans is D (The octopus and shark populations will decline.)
Most likely happen to this ecosystem if the herring are killed by a
virus D. The octopus and shark populations will decline.
What is a ecosystem?An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscapes, work together to form a bubble of life.
What is importance of ecosystem?As a society, we depend on healthy ecosystems to do many things; to purify the air so we can breathe properly, sequester carbon for climate regulation, cycle nutrients so we have access to clean drinking water without costly infrastructure, and pollinate our crops so we don't go hungry.
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