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JAMB Biology 1987 Question 40

Question 40

Mendelian Inheritance

A gene which expresses itself only in the homozygous condition is

  1. A.a mutant
  2. B.dominant
  3. C.recessive
  4. D.lethal
Show the answer and explanation

Answer: C (recessive)

Explanation

A recessive allele is masked by the dominant one, so it shows only when two copies are present (homozygous).