Max claims to have determined the broad sense heritability for earwax production
ID: 71619 • Letter: M
Question
Max claims to have determined the broad sense heritability for earwax production in humans to be 0.15 and, through a complex set of analyses, determined the narrow sense heritability for the same trait is 0.21. Charlie told Max he was sure there must be some error in Max's study. Explain why Charlie thinks there must be an error. The heritability of swimming ability is 0.25 in a population of lemmings. If the average swimmer in the current generation can swim for 5.3 minutes and, in the previous generation, the average swimmer could swim for 5.0 minutes, what was the average swimming time of the lemmings that were the parents of the current generation?Explanation / Answer
1) Broad Sense Heritability:
It is the ratio of genotypic variance VG to the total phenotypic variance ( VP)
h 2 (bs) = VG/VP or VG/VG+VE
) Narrow Sense Heritability:
It is the ratio of additive genetic variance VA to the total phenotypic variance VP ( smith, 1952)
h 2 (ns) = VA/VP = VA/VG + VE