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Q: What term defines the changes in allele frequency that have a big effect in small populations?
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If an allele makes up one half of the frequency of a populations allele for a given trait it's allele frequency is?

its not anything.


Natural selection leads to changes in both the physical appearance and what of a species?

And changes in allele frequency of populations; genes in genomes. Also in the behavioral repertoire of species.


The number of times an allele occurs in a gene pool?

Think frequent. More of the allele in the populations gene pool and there is a change in the alleles frequency. Some goes for less of the allele.


What is the Random change in a populations allele frequency is known?

Random change in allele frequency is called genetic drift.


What question did Hardy and Weinberg want to answer?

To determine how allele frequency changes


Which is an example of genetic drift?

Allele frequencies change randomly each generation. APEX


Can the genotype in a population change with the allele frequency changing?

Yes, the ratios of genotypes for a specific trait can change if allele frequency changes.


What is genetic drift and how does it affect the evolution of a species?

All events that result in changes in allele frequencies in populations contribute to evolution. Genetic drift likewise. Genetic drift is no different from all other reproductive variation, save that the term refers to changes that are more or less neutral.


What are the changes of allele frequency in a small population that is due to random chance and don't follow the laws of probability?

Random changes in allele frequency are due to genetic drift.


Describe what is occurring when a population is said to evolve?

The allele frequency of the populations gene pool is changing.


What defines chance changes in allele frequency that have a big effect in a small populations?

Genetic driftChanges in the frequency of alleles within a population is called genetic drift. Over time, this can cause a significant phenotypic shift from other populations of the same species that have not had the same genetic drift. Given enough time, genetic drift can be significant enough to cause the affected population to be reproductively isolated from the rest of its species and eventually will develop into a new species.


Why are small populations more prone to genetic disease?

In larger populations there is stronger selection against deleterious traits. The smaller the population, the greater the degree of deleterious traits are accepted.