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If two normal parents have an albino child, the genotypes of the parents are    A)...

If two normal parents have an albino child, the genotypes of the parents are

   A) AA x Aa B) Aa x Aa C) Aa x aa D) aa x aa

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Answer #1

Answer: Option B. Aa X Aa.
Explanation: Albino is a recessive trait so the offspring should have two copies of the recessive allele. Now the parents are normal which means they have a dominant allele. Since offspring should have two copies of the recessive allele to be albino each parent must contain at least one copy of the recessive allele. If we look at the options all the conditions match with option B that means each parent is Aa and they can have an albino child (25% chance). So if they have four children three will be Aa (normal) and one will be aa (albino).

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