n birds there are two genes that both influence feather phenotype. The first is an autosomal gene for feather shape with two alleles – a dominant allele for curly feathers and a recessive allele for straight feathers. The second is a sex-linked gene for feather colour with two alleles – a dominant allele for grey feathers and a recessive allele for white feathers. A cross between a male with straight, white feathers and a female with curly, grey feathers are expected to produce the following offspring: 1 curly grey male : 1 curly white female : 1 straight grey male : 1 straight white female Based on this cross, answer the following questions: i) Please provide appropriate symbols for the two alleles for feather shape. ii) Please provide appropriate symbols for the two alleles for feather colour. iii) What is the probability that a chick born to these parents will have grey feathers? iv) What is the probability of a male chick having grey feathers? v) What is the probability that this pair will have five chicks: the first two chicks will be grey males with straight feathers, and the last three chicks will not have this phenotype?
In birds there are two genes that both influence feather
The second is a sex-linked gene for feather colour with two alleles – a dominant allele for grey feathers and a recessive allele for white feathers.
A cross between a male with straight, white feathers and a female with curly, grey feathers are expected to produce the following offspring:
1 curly grey male : 1 curly white female : 1 straight grey male : 1 straight white female
Based on this cross, answer the following questions:
i) Please provide appropriate symbols for the two alleles for feather shape.
ii) Please provide appropriate symbols for the two alleles for feather colour.
iii) What is the probability that a chick born to these parents will have grey feathers?
iv) What is the probability of a male chick having grey feathers?
v) What is the probability that this pair will have five chicks: the first two chicks will be grey males with straight feathers, and the last three chicks will not have this phenotype?
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