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WAEC Agricultural Science 2007 Question 38

Question 38

Basic Genetics

Assuming that in sheep, the allele for black coat colour is dominant over that for brown coat colour. Crossing a heterozygote black with a homozygote brown will produce

  1. A.100% brown coat coloured offspring
  2. B.75% brown coat coloured offspring
  3. C.50% brown coat coloured offspring
  4. D.25% brown coat coloured offspring.
Show the answer and explanation

Answer: C (50% brown coat coloured offspring)

Explanation

Bb × bb gives half Bb (black) and half bb (brown).