Question

When can gene flow generate some form of gametic

disequilibrium?

A) Never

B) When individuals from two populations that are fixed for different alleles at several loci encounter each other in a new location and mate with each other

C) When migrants are fixed for alleles at several loci that are all at very low frequencies in the population into which they are immigrating

D) When migrants are fixed for a different mitochondrial haplotype than is found in the population into which they are immigrating AND there are alleles at a nuclear gene that is at high frequency in the migrants but low frequency in the residents, creating nuclear-mitochondrial disequilibrium

E) When each migrant is in gametic disequilibrium with itself and a visit to a chiropractor does not help

F) Answers B) and C) but not D)

G) Answers B), C), and D)

Answer 1

Gene flow can generate some form of gametic disequilibrium when individuals from two populations that are fixed for different alleles at several loci encounter each other in a new location and mate with each other. It can also generate disequilibrium when migrants are fixed for alleles at several loci that are all at very low frequencies in the population into which they are immigrating. Finally, gene flow can generate gametic disequilibrium when migrants are fixed for a different mitochondrial haplotype than is found in the population into which they are immigrating AND there are alleles at a nuclear gene that is at high frequency in the migrants but low frequency in the residents.

Step-by-step explanation:

Gene flow can generate some form of gametic disequilibrium when individuals from two populations that are fixed for different alleles at several loci encounter each other in a new location and mate with each other (Option B). This is because the mating between individuals from different populations can lead to the combination of alleles that are not commonly found in either population, creating a disequilibrium in the gametes.

Additionally, gene flow can also generate gametic disequilibrium when migrants are fixed for alleles at several loci that are all at very low frequencies in the population into which they are immigrating (Option C). In this case, the introduction of rare alleles by migrants can also create a disequilibrium in the gametes.

Finally, gene flow can generate gametic disequilibrium when migrants are fixed for a different mitochondrial haplotype than is found in the population into which they are immigrating AND there are alleles at a nuclear gene that is at high frequency in the migrants but low frequency in the residents (Option D). In this situation, the combination of different mitochondrial and nuclear alleles can create a disequilibrium in the gametes.

Therefore, the correct answer is G) Answers B), C), and D).