01.28.09 - Genetics 1.29.09 Instead males have 23 identical...

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Genetics 1.29.09 Instead males have 23 identical pairs, they have 22 pairs (autosome) Females did have 23 identical pairs Fig. pg. 78 Every conception of a male is ½ and the probability of a female is ½ A particular birth order (boy FOLLOWING a girl) 1/8 probability Boy-girl-girl 1/8 Boy-girl 3/8 1/8 Family composition every way/every birth order possibility Males are the determinant of the sex of the child Lined up in tetrads, so their segregation leads to X and Y o Other cells autosomes (chromosomes that has nothing to do with sex determination) Maternal inheritance in the x chromosome in males o Males are haploid by the x chromosome o Females are diploid by the x chromosome X chromosome has genes that are not have anything to do with sex determination o Color blindness mutation in the normal gene that is on the x chromosome Figure 4.15 o The daughter has it, tells you that the color blind is recessive
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01.28.09 - Genetics 1.29.09 Instead males have 23 identical...

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