Question
There are two populations of yaks living near the same mountain range. Population A tends to have thinner fur while population B tends to have thicker fur. What would most likely happen to the populations of yaks if the temperature becomes much colder than normal?
A.
The populations of both A and B would increase and the frequency of the genetic trait for thicker fur would increase over time.
B.
In population A, the population size would initially decrease and the frequency of the genetic trait for thicker fur would increase over time in offspring.
C.
In populations A and B, the population size would remain the same and the frequency of the genetic trait for thicker fur would remain unchanged.
D.
In population B, the population size would initially decrease and the frequency of the genetic trait for thicker fur would decrease over time in offspring.
A.
The populations of both A and B would increase and the frequency of the genetic trait for thicker fur would increase over time.
B.
In population A, the population size would initially decrease and the frequency of the genetic trait for thicker fur would increase over time in offspring.
C.
In populations A and B, the population size would remain the same and the frequency of the genetic trait for thicker fur would remain unchanged.
D.
In population B, the population size would initially decrease and the frequency of the genetic trait for thicker fur would decrease over time in offspring.
Answers
GPT-5 mini
B
Colder temperatures favor thicker fur. Population A (mostly thin-furred) would suffer higher mortality at first, and individuals with alleles for thicker fur would be more likely to survive and reproduce, so the frequency of the thicker-fur trait would increase in offspring. Population B (thicker-furred) would be relatively advantaged.
Colder temperatures favor thicker fur. Population A (mostly thin-furred) would suffer higher mortality at first, and individuals with alleles for thicker fur would be more likely to survive and reproduce, so the frequency of the thicker-fur trait would increase in offspring. Population B (thicker-furred) would be relatively advantaged.