Home / iGCSE Biology (0610)-16.2 Sexual reproduction – iGCSE Style Questions Paper 2

iGCSE Biology (0610)-16.2 Sexual reproduction – iGCSE Style Questions Paper 2

Question

Some descriptions of reproduction are listed.

  1. formation of a zygote with a diploid nucleus
  2. formation of a zygote with a haploid nucleus
  3. fusion of diploid nuclei of two gametes
  4. fusion of haploid nuclei of two gametes

Which are correct descriptions of sexual reproduction in humans?

▶️ Answer/Explanation
Solution

Ans: B

In human sexual reproduction, haploid gametes (sperm and egg) fuse to form a diploid zygote (1 correct). The fusion is of haploid nuclei (4 correct), not diploid nuclei. Therefore, the correct combination is 1 and 4.

Question

What is a disadvantage of sexual reproduction for a population in the wild?

▶️ Answer/Explanation
Solution

Ans: C

Sexual reproduction requires mates, so isolated individuals cannot reproduce (C). Options A/B/D are incorrect because sexual reproduction actually increases genetic diversity and adaptability. The real disadvantage is the need for a partner, making C the correct answer.

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