Comb Shape in Chickens Represents One of the Classic Examples

question 36

Short Answer

Comb shape in chickens represents one of the classic examples of gene interaction.Two gene pairs interact to influence the shape of the comb.The genes for rose comb (R)and pea comb (P)together produce walnut comb.The fully homozygous recessive condition (rrpp)produces the single comb.Assume that a rose-comb chicken is crossed with a walnut-comb chicken and the following offspring are produced: 17 walnut,16 rose,7 pea,6 single.
a) What are the probable genotypes of the parents?
b) Give the genotypes of each of the offspring classes.

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Definitions:

Temporary Difference

A difference between the carrying amount of an asset or liability in the balance sheet and its tax base, which will result in taxable or deductible amounts in the future.

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The income of a business as reported in its financial statements, using the accounting methods and standards specified by the relevant authority.

Deferred Tax Liability

A tax obligation that a company owes but is not required to pay until a future date.

Warranty Expense

Costs that a company incurs to repair, replace, or compensate for faulty products during the warranty period.