CIE iGCSE Co-Ordinated Science B15.2 Sexual reproduction Exam Style Questions Paper 2
▶️ Answer/Explanation
This fusion restores the full chromosome number, producing a diploid zygote and offspring.
Asexual reproduction, by contrast, involves no gamete fusion at all, so options A and B are incorrect.
✅ Answer: (C)
▶️ Answer/Explanation
The medusa stage produces egg and sperm which fuse at fertilisation, which is sexual reproduction, so statement 2 is correct.
Gametes are haploid (from meiosis) and their fusion produces a diploid zygote, so statement 3 is also correct.
✅ Answer: (D)
Question
Which statement describes one similarity between asexual and sexual reproduction?
(A) They both involve gametes.
(B) They both involve parent and offspring.
(C) They both produce genetically identical individuals.
(D) They both require fertilisation to take place.
▶️Answer/Explanation
Ans: B
Question
Which statement about reproduction is correct?
A In asexual reproduction, a diploid offspring is formed after fusion of haploid gametes.
B In asexual reproduction, a haploid offspring is formed after fusion of diploid gametes.
C In sexual reproduction, a diploid offspring is formed after fusion of haploid gametes.
D In sexual reproduction, a haploid offspring is formed after fusion of diploid gametes.
▶️Answer/Explanation
Ans : C
Question
Which statement gives an advantage of sexual reproduction over asexual reproduction?
A. The offspring are genetically different and therefore it is more likely that some can adapt to a changing environment.
B. The offspring are genetically different so all can adapt to a changing environment.
C. The offspring are genetically identical and therefore it is more likely that some can adapt to a changing environment.
D. The offspring are genetically identical so all can adapt to a changing environment.
▶️Answer/Explanation
Answer: A
Explanation: Sexual reproduction produces genetically diverse offspring, increasing the likelihood that some will have traits suited to a changing environment.