Final answer:
Alleles running to fixation and heterozygosity are both related to genetic variance in a population in biology.
Step-by-step explanation:
In biology, the diversity of alleles and genotypes within a population is called genetic variance. Alleles can run to fixation in a population, meaning that the frequency of the allele becomes 100%. Heterozygosity, on the other hand, refers to the presence of different alleles at a particular gene locus within an individual.
When alleles run to fixation, it means that one particular allele becomes more common in the population and the other alleles decrease in frequency. This can happen through natural selection, where certain alleles confer a selective advantage and individuals with those alleles have higher fitness. As a result, the beneficial allele becomes more widespread in the population.
Heterozygosity, on the other hand, indicates genetic diversity within a population. It is a measure of the frequency of different alleles at a particular gene locus among individuals. Higher heterozygosity indicates greater genetic diversity, while lower heterozygosity implies reduced genetic diversity within a population.