The Power of Genetic Constancy in Panmixia

What happens in panmixia when there is no migration, mutation, and selection?

A) Constant in genotype and phenotype

B) Constant in genotype but variable in phenotype

C) Variable in genotype but constant in phenotype

D) Variable in both genotype and phenotype

Answer: option A - Constant in genotype and phenotype

Explanation: Panmixia is a situation in which an individual is just as likely to mate with another randomly chosen individual as any other in the population. In this scenario, without migration, mutation, and selection, the frequencies are constant in both genotype and phenotype.

The concept of panmixia illustrates the power of genetic constancy in populations. When there is no influence of migration, mutation, and selection, the genetic composition within a population remains unchanged over time.

In panmixia, every individual has an equal chance to mate with any other individual in the population. This random mating leads to a uniform distribution of alleles within the gene pool, resulting in genetic constancy.

Without the introduction of new genetic variations through migration or mutation, and without selective pressures altering the frequencies of specific genotypes, the genetic composition of the population remains stable. This stability extends to both the genetic makeup (genotype) and the physical traits (phenotype) exhibited by individuals within the population.

Overall, panmixia highlights the importance of understanding the genetic dynamics within a population when considering factors such as mating patterns, genetic diversity, and evolutionary processes. The concept serves as a reminder of the fundamental role that genetic constancy plays in shaping and maintaining populations in the absence of external influences.