In Vertebrate Animals, How Does Spermatogenesis and Oogenesis Differ

Question

In vertebrate animals, how does spermatogenesis and oogenesis differ?
A) Spermatogenesis is not completed until after fertilization occurs, but oogenesis is completed by the time a girl is born.
B) Oogenesis ends at menopause, whereas spermatogenesis is finished before birth.
C) Oogenesis produces four functional haploid cells, whereas spermatogenesis produces only one functional spermatozoon.
D) The division of cytoplasm is unequal in oogenesis, whereas it is equal in spermatogenesis.
E) Oogenesis begins at the onset of sexual maturity, whereas spermatogenesis begins during embryonic development.

Accepted Answer

In oogenesis, the division of cytoplasm during meiosis is unequal, resulting in the production of one large egg cell (ovum) and two or three small non-functional polar bodies. However, in spermatogenesis, the division of cytoplasm during meiosis is equal, resulting in the production of four functional spermatozoa.