Determine the genotypes of rooster and three hens
Course:- Biology
Reference No.:- EM1398746

Assignment Help
Expertsmind Rated 4.9 / 5 based on 47215 reviews.
Review Site
Assignment Help >> Biology

Two genes combine to generate the phenotype of the comb of a rooster. The 4 possible phenotypes are walnut, rose, pea and single. Rose has an absolute requirement for the presence of the dominant allele R and pea has an absolute requirement for the presence of the dominant allele P. Some of the chickens below may carry the corresponding recessive alleles r and p in the heterozygous or homozygous from (the somatic cells of chickens are diploid). A walnut comb rooster is mated to three hens. Hen A is a walnut comb and has offspring in the ratio of 3 walnut to 1 rose. Hen B is a pea comb and has offspring in the ratio 3 walnut, 3 pea, 1 rose and 1 single comb. Hen C is a walnut comb and has only walnut comb offspring. What are the genotypes of the rooster and the 3 hens? The answers are Rooster = RrPp ; Hen A = RRPp; Hen B = rrPp; Hen C = RRPP. I just can't see how these answers came about. Any help will be truly appreciated.

Put your comment

Ask Question & Get Answers from Experts
Browse some more (Biology) Materials
This is a fairly rare genetic disorder. The enzyme thatconverts pyruvate to acetyl CoA is deficient. How will cellrespiration be affected? What symptoms will be observed?
Consider the HIV enzyme called protease. The amino acid residues at the active site are highly hydrophobic. In designing a drug that would bind to the active site and jam it,
What is the scientific name for the cheetah? What is another common name for the cheetah? In what red list category are cheetah classified? In what part of Africa are most c
To assess which residues contribute most to the stability of a protein, mutants of the protein are made in which one residue is replaced by amino acid X. The stability of th
Give an instance of a successful plant disease forecasting system and explain how it works. How plant diseases could be forecasted and what are the needs for that.
A patient has a stenotic mitral valve which has a reduced effective orifice area of 1.0 cm^2. The systolic ejection period is 330 milliseconds with a heart rate of 70 beats/
How does the formation of strobili in Equisetum comparewith that in Lycopodium and Selaginella?  Why does an enzyme capable of hydrolyzing glu-alpha-1,4-glu bonds not have the
1. What does it mean to say that the Soil Taxonomy is a generic system of classification? 2. Describe and explain the soil horizon development of Entisols. 3. In which kind of