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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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Goodtomyself Goodtomyself
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6 years ago
Knowing that persons with blonde hair exhibit the phenotype of a recessive gene, which of the following genetic scenarios would most likely underlie such a trait?
 
  A)
  aa
  B)
  A heterozygous pairing
  C)
  Either AA or Aa
  D)
  Different alleles at a gene locus
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wrote...
#1
6 years ago
Ans:
A

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A recessive trait is expressed solely in a homozygous pairing, such as aa. A heterozygous pairing, in which there are two different alleles at a gene locus, will not express a recessive trait. Aa is an example of a heterozygous pairing.
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