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dmolaie8980
Joined: 22 Feb 2009
Posts: 1
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 Posted: Thu Jul 02, 2009 5:15 pm Post subject: Q. 3 |
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Can I please have these detailed processes explained. Thanks.
3-
"BIO 14.2
You must be familiar with gametogenesis in males to answer this question."
Question: What is the detailed steps for gametogenesis? Also I don't understand how the spermatogonia is diploid and not haploid |
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admin
Site Admin
Joined: 08 Dec 2003
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| Posted: Thu Jul 16, 2009 9:05 am Post subject: Q. 3 |
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jellywing_2058
Joined: 04 May 2009
Posts: 68
Posted: 14 Jul 2009 01:44 pm Post subject: Q. 3
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Gametogenesis in males is called spermatogenesis.
The first step is for germ cells from the testes to differentiate into spermatogonia (2n) which do mitotic division. The spermatogonia then differentiate and form primary spermatocytes (2n).
Primary spermatocytes occur in prophase of meiosis I. They go through meiosis I in order to form secondary spermatocytes (n).
Secondary spermatocytes then go through meiosis II and form early spermatids (n) which then differentiate and form sperm cells (n). |
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dnpgr16513
Joined: 14 Jun 2010
Posts: 75
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calena7178147
Joined: 26 Jan 2010
Posts: 44
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| Posted: Thu Jul 08, 2010 3:00 pm Post subject: |
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The question is asking about "primordial germ cells" therefore the answer is D. spermatogonia.
Consider the word "primordial" as well in the question since it means: first created or developed. |
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