explain how you get to the correct answer and show calculations In her only clut

ID: 173623 • Letter: E

Question

explain how you get to the correct answer and show calculations

In her only clutch, a single female Eggy Bug produces thousands of tiny eggs each year. The introduction of

a predator decreases the survival of young Eggy Bugs, favoring the evolution of larger egg size. Heritability

for egg size is moderate, h 2 being equal to 0.25. What change in egg size is be predicted over a FIVE year

span if the selection differential is 200mg and heritability does not change in the face of selection?

Remember that R=S*h 2 where R is the response to selection, S is the selection differential and h 2 is the

narrow sense heritability.

a50 mg increase

b50 mg decrease

c200 mg increase

d200 mg decrease

e250 mg increase in egg size.

f250 mg decrease in egg size.

The response to selection each year is

R=S*H2= 200*0.25=50 mg

That means each year 50 mg increase in egg size will occur.Hence in a span of 5 years

5*50 mg= 250 mg increase in egg size will be there

CORRECT ANSWER IS (e)

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