Question

What happens to the distribution of gene alleles when a reproductive isolation arises between different population of the same species?

Answer 1

SOLUTION

Divergent alleles contributing to interspecific genetic incompatibility are fixed within species

Intraspecific variation has the potential to be a powerful tool for gaining insight into the processes underlying speciation

Speciation is a fundamental evolutionary process that occurs by the evolution of reproductive isolation

When species diverge in allopatry, the products of meiosis and segregation in admixed individuals produce combination of parental genotypes or chromosomal blocks that are tested by natural selection

Following is the diagram showing allele distribution when reproductive isolation arises between different population of same species

- Circles indicate the location of incompatibility pairs on the chromosome

- Squares indicate regions derived from organism 1 and triangle from organism 2

- In first generation , 50% individuals will be F1 hybrid while in subsequent generations , recombination will break up ancestry blocks and drive the fixation of parental genotypes at incompatibility loci