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Unformatted text preview: b) Cross 1: WW X O X O x ww X o Y Cross 2 : W w X O X o x ww X o Y 1/8 th of the progeny of the second cross should be tortoiseshell c) Normal Males should only have one x (with one O allele). Tortoiseshell male could result from Nondisjunction in either mother or father to produce an aneuploid egg or sperm and thus an aneuploid offspring as well. ** note a consideration of an improper crossover and the SRY region might also explain this cat....
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- Spring '03