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What is the result of crossing Aberdeen White with Victoria White?

1) All offspring are red
2) All offspring are white
3) 181 offspring are red and 139 offspring are white
4) 181 offspring are white and 139 offspring are red

Answer :

Final answer:

The result of a cross between a white-eyed male fruit fly and a female heterozygous for red eye color would be approximately 50% of the offspring having red eyes and 50% having white eyes, as eye color in fruit flies is a sex-linked trait with red being dominant over white.

Explanation:

The results from crossing a white-eyed male fruit fly with a female fruit fly that is heterozygous for red eye color can be predicted using Mendelian genetics. In fruit flies, eye color is a sex-linked trait, with the gene located on the X chromosome. Red eye color (XW) is dominant over white eye color (Xw). If the male has white eyes, his genotype must be XwY since males have one X and one Y chromosome. A heterozygous female has one red and one white allele, with the genotype XWXw.

When these two flies are crossed, the possible genotypes of the offspring are XWXw and XWY for red eyes (female and male respectively) and XwXw and XwY for white eyes (female and male respectively). This would result in approximately 50% of the offspring having red eyes (red-eyed female and red-eyed male) and 50% having white eyes (white-eyed female and white-eyed male).

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