Phenotypically Wild-Type F₁ female Drosophila, Whose Mothers Had Light Eyes

question 15

Short Answer

Phenotypically wild-type F₁ female Drosophila, whose mothers had light eyes (lt) and fathers had straw (stw) bristles, produced the following offspring when crossed to homozygous light-straw males:

Phenotype	Number
light-straw	22
wild-type	18
light	990
straw	970
total	2000

Compute the map distance between the light and straw loci.

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