Suppose that the narrow-sense heritability of wool length in a breed of sheep is 0.92, and the narrow-sense heritability of body size is 0.87. The genetic correlation between wool length and body size is –0.84. If a breeder selects for sheep with longer wool, what will be the most likely effects on wool length and body size?

There is an increase in wool length and a little decrease in body size

Explanation:

Given that:

the narrow-sense heritability of wool length in a breed of sheep is 0.92;     &

the narrow-sense heritability of body size is 0.87.

As these traits approaches 1, the higher the rate that helps them to provide a positive feedback for selection.

The question proceeds by stating that " The genetic correlation between wool length and body size is –0.84."

You see, the functionality of this negative (-0.84) genetic correlation tends to create an imbalance between these heritable traits. As such, there is a shift in the paradigm in which one traits tends to increase and the other trait to decrease.

Now, if a breeder selects a sheep with longer wool, there is an increase in wool length since he selects it although there will be a little decrease in body size due to the negative genetic correlation effect between the two heritable traits.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

straight or amphibians are homeothermic to thermal