Multiple choice

Which of the following statements does not characterise embryogenesis in human beings?

  1. The 46 chromosomes undergo changes prior to mitotic division.

  2. The zygote accomodates the combined genetic material carried by both the male and female gametes.

  3. The germinal stage takes around 10 days.

  4. Human embryology is the branch of biology, which deals with the study of the development of embryo during the first twelve weeks after fertilisation.

  5. At the onset of the ninth week, the developing embryo is known as a fetus.
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D Correct answer
Explanation

Human embryology is the branch of biology, which deals with the study of the development of embryo during the first eight weeks after fertilisation. The normal period of gestation (pregnancy) is nine months or 38 weeks.

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