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A rancher has a herd of Red Angus, Angus, Hereford cows (daughters of Red Angus sires and Angus x Hereford dams). She plans to mate her cows to C...

A rancher has a herd of ½ Red Angus, ¼ Angus, ¼ Hereford cows (daughters of Red

Angus sires and Angus x Hereford dams). She plans to mate her cows to ½ C

harolais, ½ Angus bulls. Assume F1 individual hybrid vigor for weaning weight is 30 lbs, and F1

maternal hybrid vigor for weaning weight is 48 lbs. Phenotypic means for weaning weight in

the purebred populations are 600, 600, 550 and 675 lbs, for Red Angus, Angus, Hereford and

Charolais, respectively.

d)Assuming all four breeds are unrelated, calculate the amount of individual, maternal

and total hybrid vigor for weaning weight that is retained in this cross.

e)Predict the weaning weight phenotypic mean for the

crossbred calves


SHOW ALL WORK please

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