Testis and Ovary - Testis and Ovary Under the influence of...

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Testis and Ovary Under the influence of the surrounding somatic component of the testis or ovary the germ cells multiply by successive mitotic divisions. In the male this process continues throughout life but in females it stops prior to birth. In other courses you will learn about the hormonal influences acting on the cells, the female reproductive cycle etc., but this need not concern us here where we simply need to consider what happens to the chromosomes to ensure that only (and exactly) half of the genetic material is transmitted to the next generation via a sperm or an egg. Meiosis The reduction in chromosome number from diploid to haploid is accomplished by the specialised cell divisions of meiosis . Cells prepare for meiosis by replication of their genetic material as for mitosis. However, instead of a single division as in mitosis, meiosis consists of two consecutive divisions as shown in the diagram: The first meiotic division o Prophase I The chromosomes first become
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Testis and Ovary - Testis and Ovary Under the influence of...

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