The Evolution of Populations

7 important questions on The Evolution of Populations

What is the smallest unit of evolution?

The smallest evolution, also microevolution, is the change in an allele within the whole population of this species.

What is average heterozygosity?

That is the average percentage of loci that are heterozygous.

Sources of Genetic Variation

Mutation, gene duplication and other processes which produce new alleles and new genes.
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In what sense is natural selection more predictable than genetic drift?

Natural selection is more selective to certain traits because they are more easy to prey on while genetic drift is totally random, caused by environmental changes.

Distinguish genetic drift from gene flow in terms of how they occur and their implications for future genetic variation in a population.

Genetic drift could decrease the amount of genes in the gene pool while gene flow can increase the amount of genes in a gene pool.
In the future this might mean that in the population with genetic drift that the individuals might become weaker since there is not much variation left while the population with gene flow might get stronger since they got more variation in the gene pool.

The key role of natural selection in adaptive evolution

When natural selection occurs, certain traits are selected so other traits can develop better, being able to evolve slightly over time.

Types of sexual selection

1. sexual selection
- intrasexual selection
-intersexual selection
2. sexual dimorphism

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