In assessing data that fell into two phenotypic classes, a geneti...

Question

In assessing data that fell into two phenotypic classes, a geneticist observed values of 250:150. She decided to perform a x² analysis by using the following two different null hypotheses: (a) the data fit a 3:1 ratio, and (b) the data fit a 1:1 ratio. Calculate the x² values for each hypothesis. What can be concluded about each hypothesis?

Accepted Answer

Hey everyone. Let's take a look at this question together in a cross between two p plants. The following progeny were obtained plants that have green pods totaling 960 plants that have yellow pods totaling 315. On the basis of the above observations, what is true about the parents of this cross? So let's use the information provided to try to figure out what is true about the parents of this cross. The first. Let's start off by calculating the phen oh nitpick ratio Or the green pods and the yellow pods. So we have green, we have yellow and so we have 960 green 315 yellow. So to find that ratio, we have to divide these two numbers. So dividing 960 by 3, 15 gives us 3.5. And then obviously here is one. So that ratio is about 3 to 1 which we know when we have that ratio of that 3 to 1. We have both parents being hetero zegas. Just to double check, let's do the punnett square of having two heterosexual parents. We have big g, little G, G, little G. And little G. Little G. Now we can see that these three are all dominant and this would be the green pod, whereas this one right here would be that yellow pod because it is that 3 to ratio. So to achieve this, both parents would have to be hetero ziggy's for pod color or answer choice B. The correct answer because by calculating that fanatic ratio, we get 3 to 1, which we know that a 3 to 1 ratio is the result of two parents that are hetero zegas for pod color, which is answer choice B. Hope you found this video to be helpful. Thank you and goodbye.

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