In Drosophila, the mutant genes ct (cut wings), y (yellow body), and v (vermillion eye color) are...

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Biology

In Drosophila, the mutant genes ct (cutwings), y (yellow body), and v (vermillion eyecolor) are all X-linked. Females heterozygous for all three geneswere mated with homozygous recessive males. The male progeny fromthe cross are given below. As is conventional withDrosophila, the wild-type allele of each gene isdesignated by a + sign.
ctÂ Â Â Â Â Â Â Â yÂ Â Â Â Â Â Â Â Â vÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 4
ctÂ Â Â Â Â Â Â Â yÂ Â Â Â Â Â Â Â Â +Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 93
ctÂ Â Â Â Â Â Â Â +Â Â Â Â Â Â Â Â Â vÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 54
ctÂ Â Â Â Â Â Â Â +Â Â Â Â Â Â Â Â Â +Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 349
+Â Â Â Â Â Â Â Â Â yÂ Â Â Â Â Â Â Â Â vÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 331
+Â Â Â Â Â Â Â Â Â yÂ Â Â Â Â Â Â Â Â +Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 66
+Â Â Â Â Â Â Â Â Â +Â Â Â Â Â Â Â Â Â vÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 97
+Â Â Â Â Â Â Â Â Â +Â Â Â Â Â Â Â Â Â +Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 6
Determine the allele arrangement in the heterozygousparents.
Determine the gene order of these three linked genes.
Construct a linkage map showing the map distances between thethree genes.
Calculate interference.
a. Determine the allele arrangement in the heterozygous parents.b. Determine the gene order of these three linked genes. c.Construct a linkage map showing the map distances between the threegenes. d. Calculate interference.

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ctyv4cty93ctv54ct349yv331y66v976Total population 1000In any double cross the maximum number of progeny is theprogenies which have the same genotype as that of the parents andthe progeny which have the least number is the progeny which arethe result of a double crossover So looking at the progenies wecan easily conclude thatctandyvare the original parent type and cty v and are the See Answer

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