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Problem: Two mice are heterozygous for albinism (Aa). The dominant allele (A) codes for normal pigmentation, and the recessive allele (a) codes for no pigmentation. What percentage of their offspring would have an albino phenotype? a) 100 b) 50 c) 75 d) 25

FREE Expert Solution

Given: Aa × Aa

• AA or Aa → pigmented

• aa → albino


Test Cross:

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Problem Details

Two mice are heterozygous for albinism (Aa). The dominant allele (A) codes for normal pigmentation, and the recessive allele (a) codes for no pigmentation. What percentage of their offspring would have an albino phenotype? 

a) 100 

b) 50 

c) 75 

d) 25

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