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Assume you are selecting individuals in your dairy herd as breeding stock. If the current herd production is 15,000 lbs milk / lactation, the average of the selected individuals is16,500 lbs milk / lactation, and the heritability (narrow sense) is 0.30, what is the expected milk production for the offspring of these selected parents?

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Lelia Lubowitz
Lelia LubowitzLv2
28 Sep 2019

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Related questions

A cattle rancher has determined the following variances for fat content in his herd:Total phenotypic variance100Additive genetic variance80Dominance genetic variance10Environmental variance10Show your work in each question for partial credit.A.Calculate the total genetic variance. _______B.Calculate the broad-sense heritability indicated by this data. ______C.Calculate the narrow-sense heritability indicated by this data. ______The rancher wishes to decrease fat content. If the average fat content in the starting population is 25% and he selects for breeding parents with an average fat content of 15%, what will be the expected average fat content among the offspring of the selected parents?

Hey guys! I'm a little stuck with this question, with calculating the total genetic variance I'm not sure whether my answers are correct.

(VG = VA + VD = VI

(Broad sense heritability) H2 = VG/VP

(Narrow Sense heritability) h2 = VA/VP

(Response to Selection) R = h2 x s

A plant breeder has determined the following variances for yield of corn:

Total phenotypic variance 100

Additive genetic variance 30

Dominance genetic variance 50

Environmental variance 20

Assume that there is no genetic-environmental interaction or other variances. a) Calculate the total genetic variance.

b) Calculate the broad-sense heritability indicated by these results.

c) Calculate the narrow-sense heritability indicated by these results.

d) The breeder wishes to improve yield. The average yield in the starting population is 400. Plants with an average yield of 500 are selected for breeding. What is the expected average yield among the offspring of the selected plants?

This is for my evolution class and these are the formula i might have to use: S=t* - t bar and R= h^2 S

You are running a kangaroo farm, and are very tired to building high fences to keep the Γ’Β€Β˜roos in. you decide to artificially select for kangaroos that have poor jumping ability. Your kangaroo herd can currently jump an average of three meters high. You would prefer to have a herd that jumps on average only 2 meters high. Your strategy is to select a group of poor jumpers, with an average jumping height to two meters, as the only individuals allowed to reproduce and create the next generation. Will this create a population in the next generation with an average jumping height of 2 meters? Why or why not? What additional information would you need to have to figure this out?

After reviewing your BBio466 notes more carefully, you decide to conduct some breeding experiments so you can compare jumping heights in parents and offspring.

Below is a table showing the jumping heights (m) of parents (columns 2 and 3) and their offspring (columns 2 and 5)

Breeding pair

Parent 1

Parent 2

Offspring 1

Offspring 2

1

4

3

3

2

2

2

3

1

3

3

3

5

3

2

4

1

2

0.5

3

5

1

1

1

2

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Predict the mean jumping height of the kangaroos in the next generation (i.e. the offspring the kangaroos you allowed to breed). Show your calculations.

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