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Unformatted text preview: chromosome (XY). Occasionally, an accident happens in which a person is born with too many or too few sex chromosomes. In these cases, the person will be male if they inherit a Y chromosome and female if they do not. Examples of four different possibilities that produce males are shown below. The last three are abnormal. XY XXY XXXY XYY Examples of four different possibilities that produce females are shown below. Normal females are XX. X XX XXX XXXX The cross below shows that normal females produce eggs that have one X chromosome. Half of the sperm produced by normal males have an X chromosome and the other half have a Y chromosome. XX x XY This analysis shows that half of the offspring are expected to be male, half are expected to be female....
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- Fall '10