Narrowsense heritability for milk weight in cattle has been

Narrow-sense heritability for milk weight in cattle has been estimated as 0.65. If the mean volume of milk production in a herd of dairy cattle is 1900 gallons per year. What is the predicted volume of milk production from the offspring of a mother who both produced 2100 gallons?

Solution

let take total = both + dairy cattle

from , density=mass/volume.

0.65*10/2100 = 0.65*10/1900 - 0.65*10/x

by solving above equation we get,

x = 2000 galloons (volume of milk production from the offspring of a mother).