Can a population have more than one Cline?
A cline refers to a spatial gradient in a specific, singular trait, rather than a collection of traits; a single population can therefore have as many clines as it has traits, at least in principle.
Why When closely related individuals mate with each other or inbreed are the offspring often not as fit as the offspring of two unrelated individuals?
When closely related individuals mate with each other, or inbreed, the offspring are often not as fit as the offspring of two unrelated individuals. Why? Close relatives are genetically incompatible. Inbreeding can bring together rare, deleterious mutations that lead to harmful phenotypes.
What is nm in population genetics?
Nmest. estimate of gene flow. p(1) average frequency of alleles observed in only one population.
Why is genetic drift dependent on the size of the population?
Genetic Drift Decreases Gene Diversity and Leads to Population Subdivision. The chance of fixing an allele due to genetic drift depends on the effective population size as well as the frequency distribution of alleles at a locus.
What is a potential negative effect that can result from inbreeding?
Inbreeding occurs when two closely related organisms mate with each other and produce offspring. The two main negative consequences of inbreeding are an increased risk of undesirable genes and a reduction in genetic diversity. The House of Habsburg may be the best example of the effects of inbreeding in humans.
What is most likely to increase the effective size of a population?
Random mating also increased the fertility rate and produce more chances of having offsprings than non-random mating. Balancing the sex ratio will also increase the effective population size because of the more chances of mating and a rise in the number of breeding populations.
Can natural selection increase heterozygosity?
Natural selection can cause microevolution When a phenotype produced by certain alleles helps organisms survive and reproduce better than their peers, natural selection can increase the frequency of the helpful alleles from one generation to the next that is, it can cause microevolution.
What is average heterozygosity?
A measure of the genetic variability within a population, being the average proportion of organisms that are heterozygous for a specified set of gene loci.