What should be the average wing length of the progeny of the selected cockroaches?

a. Phenotypic variation was analysed for milk production in a herd of dairy cattle and the following Show more a. Phenotypic variation was analysed for milk production in a herd of dairy cattle and the following variance components were obtained: Additive genetic variance (VA) = 0.34 Environmental variance (VE) = 0.69 Estimate the narrow-sense heritability of milk production. b. Joe is breeding cockroaches in his college room. He finds that the average wing length in his population is 2.5 cm. He chooses 4 male and 4 female cockroaches that have the largest wings with an average wing length of 4 cm. Joe interbreeds these. From earlier studies he knows that the narrow-sense heritability for wing length in his population of cockroaches is 0.6. i) How much better are his breeding population (the selection differential) from the rest? ii) Do you expect the average EBVs of the male and female cockroaches to be the same? iii) What is the estimated breeding value (EBV) for these breeding cockroaches for wing length? iv) What should be the average wing length of the progeny of the selected cockroaches? v) Would you expect the average wing length of the cockroaches to continue to increase over many years? Show less

QUICK QUOTE

Approximately 250 words