WAEC Biology 1996 Question 51

Question 51

Chromosomes, DNA and Sex Linkage

Which of these statements is correct?

  1. A.Recombination at fertilization does not occur between two homologous chromosome
  2. B.In homologous chromosome two genes very close to each other are more likely to form recombinants at meiotic prophase I
  3. C.A dominant gene masks the presence of a recessive gene
  4. D.Meiosis leads to the formation of daughter cells with diploid chromosome number
  5. E.Mitosis increases variation within a population
Show the answer and explanation

Answer: C (A dominant gene masks the presence of a recessive gene)

Explanation

In a heterozygote the dominant allele hides the effect of the recessive one.