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In Drosophila, the Genes Y (Yellow Body)and Car (Carnation Eyes)are

Question 27

Multiple Choice

In Drosophila, the genes y (yellow body) and car (carnation eyes) are located at opposite ends of the X chromosome.In doubly heterozygous females (y+ car+ / y car) , a single chiasma is observed somewhere along the X chromosome in 90% of the examined oocytes.No X chromosomes with multiple chiasmata are observed.What percentage of the male progeny from such a female would be recombinant for y and car?


A) 5%
B) 10%
C) 45%
D) 55%
E) 90%

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