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WAEC Biology 2011 Question 24

Question 24

Chromosomes, DNA and Sex Linkage

What will be the chromosome number of the hybrid of two varieties of a plant with 36 chromosomes in the endosperm cell?

  1. A.12
  2. B.24
  3. C.36
  4. D.48
Show the answer and explanation

Answer: B (24)

Explanation

Endosperm cells have three sets of chromosomes: 3n = 36, so n = 12. A hybrid plant body is diploid, 2n = 24.