What is true about gametogenesis in both males and females? A) Primary spermatocytes and primary oocytes...

What is true about gametogenesis in both males and females?

A) Primary spermatocytes and primary oocytes contain the diploid number of chromosomes.

B) The haploid number of chromosomes first appears in the gametes.

C) Gametes are formed in special structures called follicles.

D) Meiosis II is completed in all of the gametes that are produced.

Solutions

Expert Solution

Answer ) (A) Primary Spermatocytes and Primary oocytes contain diploid number of chromosomes.

SPERMATOGENESIS :- Primary spermatocytes are diploid while secondary spermatocytes are haploid.

OOGENESIS :- Primary oocytes are diploid but secondary oocytes are haploid.

# OTHER OPTIONS -

The haploid number of chromosomes are first formed in secondary oocytes then finally gametes (ova,sperms) are formed with haploid chromosomes.
Gametes are not formed in any follicles.
Meiosis 2 is not completed in female oocytes.

In human females, meiosis-II is not completed until fertilisation. Secondary oocyte is arrested in metaphase-II stage until sperm cell contacts plasma membrane of the oocyte and completes meiosis II resulting in release of ovum.

Sydney Mullin answered 11 months ago

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