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Diseases: Sex Linked and Sex Influenced


by Richard Nixon
Honors Biology
Mrs. Linda
December 19, 1994

There are thousands of cases of sex linked and sex influenced diseases
worldwide. These diseases can range from a social inconvenience, to a fatal
ailment. In sex linked diseases, like Muscular Dystrophy, hemophilia and color
blindness, only males are affected. When a man infected with a sex linked
disease has children, all his sons are normal, but all of his daughters are
carriers. When a carrier woman and an uninfected man have children, half of the
sons are normal, and half of the sons are affected; half of the daughters are
carriers and half of the daughters are normal. Only males are affected because
the sex linked diseases affect the X chromosome. Males have one X chromosome
and one Y chromosome, so they need to use that X, whether it is flawed or not.
Females on the other hand, have two X chromosomes, so if one is defective, they
can use their second X......

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Approximate Word Count: 3003
Approximate Pages: 13 (250 words per double-spaced page)

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