You are studying four recessive alleles in hawks. They are blunt talons (t), sma

Question

You are studying four recessive alleles in hawks. They are blunt talons (t), small wings (s), featherless (f), and short beak (b). The wild type counterparts of these genes are represented with a "+" symbol. A hawk that is homozygous recessive for all four genes is crossed with one that is homozygous dominant at all four loci to produce an F1 generation. The F1 hawks are test-crossed with hawks that are homozygous recessive for all four genes. A total of 1,000 progeny are scored phenotypically, yielding the following:

Draw a genetic map for the location of these four genes. Your map should clearly indicate which genes are linked on the same chromosome, and the map distance between linked genes should be indicated.

Explanation / Answer

f-------0.1--------s----0.2-----t------0.3----b

<-------0.5 m units------->

<----------------------0.6 m units--------------->

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