Question

In vertebrate animals, spermatogenesis and oogenesis differ in that ________. In vertebrate animals, spermatogenesis and oogenesis differ in that ________. oogenesis ends at menopause, whereas spermatogenesis is finished before birth spermatogenesis is not completed until after fertilization occurs, but oogenesis is completed by the time a girl is born oogenesis produces four functional haploid cells, whereas spermatogenesis produces only one functional spermatozoon oogenesis begins at the onset of sexual maturity, whereas spermatogenesis begins during embryonic development the division of cytoplasm is unequal in oogenesis, whereas it is equal in spermatogenesis

Answer 1

Answer:

the division of cytoplasm is unequal in oogenesis, whereas it is equal in spermatogenesis

Explanation:

Spermatogenesis includes meiosis in primary spermatocytes. These are the diploid cells and completion of meiosis in one primary spermatocyte forms four haploid spermatids. The process of cytokinesis at the end of meiosis-I and meiosis-II equally divides cytoplasm among the daughter cells. Therefore, all the cells produced have an equal amount of cytoplasm.

On the other hand, oogenesis includes unequal cytokinesis by the end of meiosis-I and meiosis-II. It produces a larger secondary oocyte and a relatively smaller first polar body by the end of meiosis-I. Similarly, the mature egg cell is also larger than the second polar body. This occurs so that the zygote can have enough cytoplasm to enter mitosis.