The simplest explanation for this inheritance pattern is that the rooster and the hen are both heterozygous for the gene that controls feather color and they are both carrying one dominant allele for grey feathers and one recessive allele for black or white feathers.
What is the definition of phenotype?Phenotype refers to the observable physical and physiological characteristics of an organism, which are determined by the combination of its genetic makeup (genotype) and the environment. Phenotype is the physical appearance of the organism which we can observe and measure, it can be shape, size, color, etc.
When rooster and hen cross, the dominant allele for grey feathers masks the expression of the recessive alleles, so all of the offspring appear grey. However, when the offspring inherit one dominant allele and one recessive allele from each parent, the recessive alleles are able to express their phenotype in a ratio of 7 black feathers: 8 white feathers offspring.
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How do you make RNA from a cell?.
DNA transcription, which shares certain characteristics with DNA replication in how it produces all of the RNA in a cell, is how DNA is replicated. A little section of the DNA double helix is first opened and unraveled during transcription in order to reveal the nucleotides on each DNA strand.
Simply put, producing a gene's matching protein is called expression, and it involves a complex process with two main components. The initial step of transcription is the transformation of DNA information into an mRNA (messenger RNA) molecule. The manufacture of a pre-mRNA molecule is aided by the enzyme RNA polymerase II, which also catalyzes the transcription of complementary base pairs from a gene's DNA to create mature mRNA. The resulting mRNA needs to be translated into a protein molecule because it is a single-stranded copy of the gene.
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