Gametes and fertilisation in mammals Quiz
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5 questions, one answer each
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1. What is the function of the enzymes released from the acrosome?
- A. To provide ATP for the tail
- B. To digest the zona pellucida
- C. To stop other sperm entering
- D. To fuse the two nuclei
2. Which structure in the egg releases its contents in the cortical reaction?
- A. Acrosome
- B. Mid-piece
- C. Cortical granules
- D. Zona pellucida
3. Why is the sperm mid-piece full of mitochondria?
- A. To store nutrients for the embryo
- B. To digest the zona pellucida
- C. To release ATP for the tail to beat
- D. To carry the sperm DNA
4. What is the result of the cortical reaction?
- A. The zona pellucida becomes impenetrable to other sperm
- B. The sperm nucleus is released
- C. The egg completes cell division by mitosis
- D. The acrosome fuses with the sperm membrane
5. A zygote is found with three sets of chromosomes. Which is the most likely cause?
- A. Failure of the acrosome reaction
- B. Failure of the cortical reaction
- C. Failure of the sperm tail to move
- D. Too much energy in the egg