Question

In guinea pigs, white coat (w) is recessive to black coat (W) and wavy hair (v)...

In guinea pigs, white coat (w) is recessive to black coat (W) and wavy hair (v) is recessive to straight hair (V). A breeder crosses a guinea pig that is homozygous for white coat and wavy hair with a guinea pig that is black with straight hair. The F1 are then crossed with guinea pigs having white coats and wavy hair in a series of testcrosses. The following progeny are produced from these testcrosses: (Hint: To test for independent assortment, we first test for equal segregation at each locus, then test whether the two loci sort independently. Finally, we test for independent assortment, where we expect 1:1:1:1 phenotypic ratios.) Show your work.

black straight   30

black wavy 10

white straight 12

white wavy 31

total 83

a. Are the genes that determine coat color and hair type assorting independently? Carry out chi-square tests for independence to test your hypothesis. In the first table, enter the correct observed values. In the second table, enter the expected values

observed values

Ww ww row total
Vv
vv

83 total

expected

Ww ww
Vv
vv
total 83

values

0 0
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Answer #1

SI 3-1 12, 3 lwerejectthenullhypothesis.

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