Question

Genetics of seed color:

A cross of white and green summer squash plants gives the following numbers of squash in the second generation:

Seed Coat Color	white squash	yellow squash	green squash
Seed Count	131	34	10

According to genetics laws, the distribution of seed color, in this second generation, should be 12:3:1. That is out of 16 seeds, it is expected 12 will be white, 3 will be yellow, and 1 will be green.

The Chi-Square Test for Goodness of Fit will be used to determine whether these data are consistent with a 12:3:1 model of genetic inheritance.

The expected count of yellow squash is about

Hint: There are a total of 175 seeds.

(C is incorrect )

	A.	0.0625.
	B.	10.9.
	C.	32.81.
	D.	0.1875.

Answer 1

The generic model suggests that the possibility of yellow squash is 3 out of 16

we know that probability = (favorable outcome)/(total outcome)

here favorable is 3 and total is 16 for yellow squash

so, the probability is 3/16 for yellow squash

Using the formula, expected count = (total count)*probability

we have total count = 131+34+10 = 175 seeds and probability of yellow squash is 3/16

setting the values in the above formula, we get

The expected count for the yellow squash = 175*(3/16) = 525/16 = 32.81

so, option C is correct answer