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Chapter 5: Problem 4

If the phenotype trait of an \(A a\) heterozygous individual is the same as that of an \(A A\) homozygous individual, which allele is recessive?

Short Answer

Expert verified
Answer: The recessive allele is a.

Step by step solution

01

Determine the phenotype traits of the heterozygous individual

The problem states that the phenotype trait of an \(Aa\) heterozygous individual is the same as that of an \(AA\) homozygous individual. Since the phenotype is determined by the dominant allele, we can conclude that the dominant allele is \(A\).
02

Identify the recessive allele

Now that we know the dominant allele is \(A\), we can determine the recessive allele. In this case, the recessive allele is the one not being expressed in the phenotype trait of the heterozygous individual, which is \(a\).
03

Answer

Based on the information given, the recessive allele is \(a\).

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