CIE iGCSE Co-Ordinated Science B15.2 Sexual reproduction Exam Style Questions Paper 1
Question
Which row is correct for sexual reproduction?
▶️Answer/Explanation
Ans: C
Question
What is produced by the fusion of the nuclei of two gametes?
A. embryo
B. fetus
C. ovum
D. zygote
▶️Answer/Explanation
Answer: D. zygote
Explanation: The fusion of the nuclei of two gametes (sperm and egg) during fertilization produces a zygote, which is the first cell of a new organism.
Question
Which statement correctly describes sexual reproduction?
A. fusion of gametes from two parents with genetic variation in the offspring
B. fusion of gametes from two parents with no genetic variation in the offspring
C. no fusion of gametes and only one parent with genetic variation in the offspring
D. no fusion of gametes and only one parent with no genetic variation in the offspring
▶️Answer/Explanation
Answer: A. fusion of gametes from two parents with genetic variation in the offspring
Explanation: Sexual reproduction involves the fusion of gametes from two parents, resulting in offspring with genetic variation due to the combination of different alleles from each parent.
Question
Sexual reproduction involves the fusion of cells. Which row shows the types of cells involved and what the fusion produces?
| type of cell | product of fusion | |
|---|---|---|
| A | gametes | genetically different zygote |
| B | gametes | genetically identical zygote |
| C | zygotes | genetically different gamete |
| D | zygotes | genetically identical gamete |
▶️Answer/Explanation
Answer: A
Explanation: Sexual reproduction involves the fusion of gametes (sperm and egg) to form a zygote, which is genetically different from the parents due to the combination of genetic material.