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JAMB Biology 1980 Question 42

Question 42

Chromosomes, DNA and Sex Linkage

If a baby is a female, her mother's ovum must have been fertilized by a sperm carrying the chromosome

  1. A.X
  2. B.XY
  3. C.XX
  4. D.YY
  5. E.Y
Show the answer and explanation

Answer: A (X)

Explanation

Every ovum carries X; an X-carrying sperm gives XX, a girl.