Bemidajesus999idn
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1.what do you call a cell produced at an early stage in the formation of spermatozoa formed in the wall of a seminiferous tubule and giving rise by mitosis to spermatocytes 2. how many stages of meiosis are there in the formation of spermatogenesis 3. which meiotic division were four spermatids produced 4. how many human chromosomes are there in a diploid cell? haploid cell? 5. how are diploid and numbers represented?​

Sagot :

Mika507idn

Answer:

1. spermatogonia

The seminiferous tubules, in which the sperm are produced, constitute about 90 percent of the testicular... The immature cells (called spermatogonia) are all derived from cells called stem cells in the outer wall of the seminiferous tubules.

2. There are 12 different stages of the cycle in the bull of about 14 days each;

approximately four cycles within a given region of the tubule occur before an A1 spermatogonia is transformed into a spermatozoa. Six stages have been noted in man; four 16-day cycles are needed to complete spermatogenesis.

3. Spermatogenesis

Spermatogenesis: During spermatogenesis, four sperm result from each primary spermatocyte, which divides into two haploid secondary spermatocytes; these cells will go through a second meiotic division to produce four spermatids.

4. 46 chromosomes

A human diploid cell contains 46 chromosomes (23 pairs of chromosomes). A haploid cell (as it names suggests), has half of these - aka a single pair of each chromosomes.

5. Diploid cells have two sets of chromosomes.

Haploid cells have only one. The diploid chromosome number is the number of chromosomes within a cell's nucleus. This number is represented as 2n.

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