Multiple choice

Which of the following statements is true regarding the sperm and ova?

  1. In a normal human male, the sperm count is about 20-40 million.

  2. Just after ejaculation, the sperm can fertilise an ovum.

  3. In human females, the fertilized egg secretes hPL to maintain the corpus luteum.

  4. The human egg cell completes its second meiotic division after sperm penetration.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

During the I meiotic division in oogenesis, a large secondary oocyte is produced. The secondary oocyte will divide to produce an egg and a polar body. The polar bodies, although dysfunctional, contain a full set of chromosomes. Meiosis in females starts at birth and halts in the prophase I, and it does not resume until puberty. The II meiotic division will resume after the penetration of sperm.

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