Question

3) In a given population, the egg-to-adult survival rates of genotypes A1A1, A1A2, and A2A2 are 70, 80, and 90 percent respectively, and their fecundity values are 90, 150, and 200 eggs per female respectively. a) Calculate the absolute fitnesses (W) and relative fitnesses (w) of these genotypes. b) Which of these genotypes do you expect to increase in frequency over time? Explain.

please answer all questions.

Answer 1

Genotypes	A1A1	A1A2	A2A2
Survival rate	70%	80%	90%
Fecundity value	90	150	200
Survival rate x fecundity value	0.7x90= 63*	0.8x150= 120*	0.9x200= 180*
relative fitness (w)	63/180= 0.35	120/180= 0.66	180/180= 1.0

(Inorder to calculate relative fitness ,we should divide each Genotypes survival and /or reproductive rate/fecundity value by the highest survival and /or reproductive rate among the 3 Genotypes.

If both survival rate and fecundity rate vary among Genotypes ,then we need to divide each survival x reproduction rate by the highest survival x reproduction rate.

b)The Genotypes that will increase in frequency have a relative fitness greater than one

The Genotypes that will decrease in frequency have a relative fitness less than one.

In this question A2A2 genotype is having relative fitness which equals 1.0.So A2A2 genotype will increase in frequency over time.