Biology 2581B Study Guide - Midterm Guide: Metaphase, Arabidopsis Thaliana, Genetic Distance
19 Apr 2016
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Bio 2581b 2011: practice questions from tutorial 1: a three-point test cross is performed using the markers q, t, and r, which produces the following progeny phenotypes and frequencies: The progeny phenotypes and their frequencies are: ca- ftz+ w- ca+ ftz+ w+ ca- ftz+ w+ ca+ ftz+ w- In north american squirrels, two genes that determine coat colour and length, b and w, are 14 map units apart. B is dominant over b and produces a brown coat, and w is dominant over w and results in wavy fur. Squirrels with white, wavy fur (b/b w/w) are crossed to squirrels with brown, straight fur (b/b w/w). The f1 progeny of this cross are then crossed to a homozygous recessive squirrel with white, straight fur. A is 15 map units from b, and b and d are completely linked. Genes m, n and p are located on chromosome 2 in mus musculus (mice). Their relative locations and map distance is shown:
