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WAEC Biology 2010 Question 48

Question 48

Mendelian Inheritance

A man heterozygous for albino gene marries a woman who is also heterozygous for the gene. Both have normal skin colour. The probability that they will have an albino child is

  1. A.1/3
  2. B.1/4
  3. C.4/4
  4. D.2/4
Show the answer and explanation

Answer: B (1/4)

Explanation

Aa × Aa gives AA, Aa, Aa and aa; only aa (1 in 4) is albino.