In birds there are two genes that both influence beak
The second gene for beak shape is a sex-linked gene with two alleles – a dominant allele for sharp beaks and a recessive allele for rounded beaks.
A cross between a male with a black, rounded beak and a female with a black, sharp beak are expected to produce the following offspring:
3 males with black, sharp beaks : 3 females with black, rounded beaks : 1 male with a grey, sharp beak : 1 female with a grey, round beak
Based on this cross, answer the following questions:
i) Please provide appropriate symbols for the two alleles for beak colour.
ii) Please provide appropriate symbols for the two alleles for beak shape.
iii) What is the probability that a chick born to these parents will have a rounded beak?
iv) What is the probability of a male chick having a sharp beak?
v) What is the probability that this pair will have five chicks: the first two chicks will be females with black, rounded beaks, and the last three chicks will not have this phenotype?
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
