Author Question: A geneticist is investigating the inheritance of two autosomal recessive genes in mice, one for ... (Read 61 times)

piesebel · **on:** Jan 12, 2022

A geneticist is investigating the inheritance of two autosomal recessive genes in mice, one for obesity (LEP) and another for autism (oprm1). The table below provides the number of offspring observed, for each phenotype, when dihybrid mice are testcrossed:

Phenotype	Observed(O)	Expected (E)	O-E	(O-E)2	(O-E)2/E
wild-type	88
obese	68
autistic	64
obese, autistic	80
					∑ (O-E)2/E=

Fill in the table above and determine:

a.	the chi-square (χ²) value (to the nearest hundredth) for the chance hypothesis that the two

genes assort independently

b.	the degrees of freedom

c.	whether or not you would reject your chance hypothesis that the two genes assort

independently, based on your approximate P value, and the justification for why

nixon_s · **Reply #1 on:** Jan 12, 2022

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