Cats have recently migrated from Malaysia to an uninhabited island in the South China Sea. The gene pool of the migrants includes both alleles for straight (T) and stub (t) tails. You study selection pressures on these cats in the wild, finding the following survivorship in a cohort of 650 kittens.
Phenotype Straight Bent Stub Genotype TT Tt tt Number of Kittens 100 250 300 Surviving adults 70 161 126
a) Calculate survivorship and relative fitness for each genotype
b) Calculate the selection coefficient (s) and degree of dominance (h)
c) Is the population of kittens in Hardy-Weinberg Equilibrium? [Assume that freq. (T) = p and freq. (t) = q].
d) Calculate the average fitness of the population of kittens and of the population of adults.
e) Calculate allele frequencies before (kittens) and after (adults) selection in the next generation. [Assume that freq. (T) = p and freq. (t) = q].
f) Which of the two alleles is deleterious? Justify your answer.
Cats have recently migrated from Malaysia to an uninhabited island in the South China Sea. The gene pool of the migrants includes both alleles for straight (T) and stub (t) tails. You study selection pressures on these cats in the wild, finding the following survivorship in a cohort of 650 kittens.
| Phenotype | Straight | Bent | Stub |
| Genotype | TT | Tt | tt |
| Number of Kittens | 100 | 250 | 300 |
| Surviving adults | 70 | 161 | 126 |
a) Calculate survivorship and relative fitness for each genotype
b) Calculate the selection coefficient (s) and degree of dominance (h)
c) Is the population of kittens in Hardy-Weinberg Equilibrium? [Assume that freq. (T) = p and freq. (t) = q].
d) Calculate the average fitness of the population of kittens and of the population of adults.
e) Calculate allele frequencies before (kittens) and after (adults) selection in the next generation. [Assume that freq. (T) = p and freq. (t) = q].
f) Which of the two alleles is deleterious? Justify your answer.
