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