Phenotypically Wild-Type F₁ Female Drosophila,whose Mothers Had Light Eyes (Lt)and

question 26

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:
$\begin{array}{lc}\text { Phenotype } & \text { Number } \\\hline \text { light-straw } & 22 \\\text { wild-type } & 18 \\\text { light } & 990 \\\text { straw } & \underline{970} \\& \text { Total: } \underline{2000}\end{array}$
Compute the map distance between the light and straw loci.

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