Question

Which of these statements best describes a recessive allele? A. The allele that is abnormal B....

Which of these statements best describes a recessive allele?
A. The allele that is abnormal
B. The allele that shows its effect in both homozygous and heterozygous states
C. The allele that is less prevalent in the population
D. The allele that shows its effect on phenotype only in homozygous state
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Answer #1

Answer: D The allele that shows its effect on phenotype only in the Homozygous state

A recessive allele is a gene whose effect is not expressed unless it is present as a homozygous form in the organism.

Eg: Tay-Sachs Disease

Tay-Sachs disease is a recessive disorder caused by non-functioning alleles in the HEXA gene.

2) the allele for blue eyes is recessive, therefore to have blue eyes you need to have two copies of the 'blue eye' allele in homozygous state

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