NEED HELP ASAP (5 pts) A racing dog breeder would like to breed greyhounds that

Question

NEED HELP ASAP

(5 pts) A racing dog breeder would like to breed greyhounds that run faster, but she does not know the heritability of running speed. She measures the running speed of 100 greyhounds, and mean running speed is 14.2 m/s. You pick 20 champion greyhounds with the fastest running speed to breed. Their mean running speed is 16.6 m/s. The offspring of these greyhounds have average running speed of 15.3 m/s. What is heritability of running speed in the breeder's dog ? Show all your work.

Explanation / Answer

Narrow Sense Heritability:

h2 = M2 - M / M1 - M

A parental population with normal distribution (M)

A “selected” segment of the parental population that expresses the desired quantitative phenotype (M1)

The offspring (M2) resultant of interbreeding the selected M1 group

M= 14.2 m/s

M1= 16.6 m/s

M2= 15.3 m/s

Now-

h2 = 15.3-14.2 / 16.6-14.2

= 1.1/2.4 = 0.45

h2=0.45

heritability is 0.45

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