What is the value of x2 for a test of the hypothesis that, Ask an Expert

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In Drosophila, singed bristles (sn) and carnation eyes (car) are both caused by recessive alleles. The wild-type alleles (sn+ and car+) are responsible for straight bristles and red eyes, respectively. A sn+ car female is mated to a sn car+ male and the F1 progeny are testcrossed, resulting in the following distribution of offspring:

sn car 42
sn car+ 65
sn+ car 55
sn+ car+ 38

Total 200

What is the value of X2 for a test of the hypothesis that the sn and car genes are unlinked?

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Category:- Biology
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