150-JP6(L6,13)

150-JP6(L6,13) - BISC 150 Petruska Lecture 6 150-JP6(L6,13...

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BISC 150 Petruska Lecture 6 150-JP6(L6,13).ppt Sex and Sexually Transmitted Diseases References : Lewis, Human Genetics (8th Ed. 2008), Chaps. 6, (13,15,17) Also, see Wikipedia.com (free encyclopedia) or Johns Hopkins Symptoms & Remedies (Complete Home Medical Reference)
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Fig. 6.1 Male or Female? Paired duct systems in the early human embryo may develop into male or female sex organs. The red tubes represent female structures and the blue tubes, male structures. Male sex organ development requires presence of SRY gene (on Y chromosome). Activation of SRY starts a cascade of gene action that causes the undifferentiated gonad to develop into testis. Then some cells in testis secrete hormone that causes Mullerian (red) duct to disintegrate. Other cells in testis secrete testosterone, which stimulates Wolffian (blue) duct to develop male structures.
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A Karyotype is a chart of the chromosomes organized by the size of the chromosome pairs. Figure 1.2
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150-JP6(L6,13) - BISC 150 Petruska Lecture 6 150-JP6(L6,13...

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