Question

The production of sperm begins at puberty when spermatogonia undergo meiosis I to form primary spermatocytes, which then undergo meiosis II to form secondary spermatocytes. These secondary spermatocytes go on to form spermatids, which mature into sperm cells.1. True 2. False

Answer 1

Answer:

False

Explanation:

• Primary spermatocyte is produced by mitotic division of spermatogonia cells not by meiosis 1 and thatswhy primary spermatocyte is dipploid..
• Primary spermatocytes goes to Meiosis I and produce secondary spermatocytes.
• Secondary spermatocytes goes to meiosis II to produce round spermatids.
• Spermatids form the spermatozoa ( a complete mature sperm cell).

Answer 2

Answer:

False

Explanation:

At the beginning of the  process of spermatogeneis(production of sperms),  many cells in the seminefeorus tublues of the testis  go through mitosis to form diploid  Spermatogonia. These  diploid spermatogia  undergo mitosis,(not meioisis) and  later    differentiate  to form diploid primary spematocytes

The  beginning of  secretion of  reproductive hormones( testosterone) at puberty  stimulated the  diploid primary spermatocytes  to undergo the first  meiotic division (note not  meiosis II) to  produce  haploid Secondary spermatocytes .

The haploid  secondary spermatocytes   go through second mitotic division  to form haploid spermatids, which later  differentiated  to  haploid spermtozoan, with DNA condense in  then head.