Using the combined data from males and females, the estimate of narrow-sense heritability would be:
h2 = 0.08
h2 = 0.80
h2 = 0.40
h2 = 0.04
h2 = 0.20
Part B
The statistical test of the regression slope evaluates how likely it is that we would have obtained a slope this large if the true heritability were zero. The usual p-value threshold for a statistical test is 0.05. Thus, what is the correct interpretation of the p-value of 0.04 in the combined analysis?
The p-value is less than 0.05, supporting the hypothesis that height variation lacks a genetic component.
The p-value is less than 0.05, supporting the hypothesis that height variation has a genetic component.
The p-value is less than 0.05, so there is insufficient evidence that human height variation has a genetic component.
The p-value is less than 0.05, rejecting the hypothesis that height variation has a genetic component.