Explain how the unusual female is produced.

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In Drosophila, an X-linked recessive allele produces yellow body color. The cross of a yellow female and a male with wild-type body color usually produces wild-type females and yellow males. Occasionally however, a yellow female is produced.

 

Explain how the unusual female is produced.

 

 

asked Nov 23, 2012 in Genetics by GeneX ~Top Expert~ (7,947 points)
    

1 Answer

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It happens when nondisjunction in the female parent produces an egg with two X chromosomes. TheXXY zygote will develop as female and will be homozygous for the recessive yellow-body allele.

answered Nov 23, 2012 by GeneX ~Top Expert~ (7,947 points)

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