In the fruit fly D. virilis, the mutations dusky body color (dy), cut wings (ct), and...

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Biology

In the fruit fly D. virilis, the mutations dusky body color(dy), cut wings (ct), and white eyes (w) are all recessive alleleslocated on the X chromosome. Females heterozygous for all threemutations were crossed to dy ct w males, and the followingphenotypes were observed among the 500 offspring.
wildtype 18
dusky 153
cut 6
white 76
cut, white 150
dusky, cut 72
dusky, cut, white22
dusky, white 3
14) What are the genotypes of the two maternal X chromosomes,with the genes in the correct order?
a) dy + w / + ct
b) dy + + / + w ct
c) dy w + / + ct
d) dy w ct / + + +
e) + ct + / dy + w
15) What is the recombination frequency between dusky andwhite?
a) 148/500
b) 46/500
c) 43/500
d) 49/500
e) 40/500
PLEASE EXPLAIN!!!! CLEARLY!!!

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4.2 Ratings (663 Votes)

The genotype of wild type is as dominant or wild type charecter is denoted by andall the three charecter is wild typethe genotype of dusky color is dy except dusky color other two alleles will be wild typeie type the genotype of cut wing is ct ie other two alleles are type the genotype of whiteeye is w the genotype of cut and white combination is ct w ie only one charecter iswild type the genotype of dusky and cut combination isdy ct the genotype of dusky cut and white is dy ct w no charecter is of wild type the genotype of dusky and white combination is dy wgenotypenumber of offsprings 18dy 153ct See Answer

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