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Natural Selection/Genetic Drift
Kip Strosin
Wiki User
∙ 11y ago1. Genetic Drift: This represents random changes in small gene pools due to sampling errors in propagation of alleles. The bottleneck effect and founder effect are prime examples of genetic drift. In either case the number of individuals in a population is drastically reduced distorting the original allelic frequencies.
2. Gene Flow: The movement of alleles into and out of a gene pool. Migration of an organism into different areas can cause the allelic frequencies of that population to increase. Most populations are not isolated, which is contrary to the Hardy-Weinberg Theorem.
3. Mutations: These changes in the genome of an organism are an important source of natural selection.
4. Nonrandom mating: Inbreeding is a popular form of nonrandom mating. Individuals will mate more frequently with close individuals than more distant ones. Assortive mating, is another form of nonrandom mating. Here the individuals will mate with partners that closely resemble themselves in certain characteristics.
5. Natural Selection: Populations vary in the types of individuals and their reproductive success. Those individuals who leave more offspring behind than others, pass on more of their alleles and have a better success rate in dominating the population.
Wiki User
∙ 9y agoA gene pool must have lots of variation in the genotypes and phenotypes before the formation of species.
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What is a gene pool consists of all the genes within a?
all alleles for all genes in a population.
What can occur for limited gene flow?
Mutations can occur in gene processing errors.
What is a change in the frequency of a particular gene in one direction in a population called?
Directional selection.
The gene pool for a particular gene is?
a gene pool is the mixture of a group of a species' genes. like, if you took all of the DNA of a group of people, and mixed it all together, that would be a gene poolThe total of all alleles present in a population.All of the alleles in one population
What condition is necessary for genetic drift to have a significant effect on a population A natural disaster must occur. The population needs to be small. Gene flow must occur. A portion of the p?
The population needs to be small is the necessary condition for genetic drift to have a significant effect on populations.
What must occur for a gene pool within a population to change?
A genetic mutation within the population.
What must occur for the gene pool within population to change?
natural selection or genetic drift
How does mutation occur in the population?
Mutation can create new alleles, therfore can change allele frequencies in a population.
What does natural selection cause in a population on a genetic level?
Change in the allele frequency within the gene pool. ?
A genetic change which can effect a species fitness?
evolution within a species. the allele frequencies in a gene pool of a population
How does gene flow occur in fungi or plant population?
fungi is yellow
What is a way for a gene flow to occur?
An individual organism moves into a new population
How does gene flow affect the fitness of population?
Gene flow within a population distributes mutations among the individuals. Immigration and emigration transport alleles into and out of a population's gene pool, thus affecting the result of natural selection.
Farmers change gene pool of a population by?
Artificial selection
When a gene changes within a population over time it is referred to as?
genetic drift
Evolution can occur through a variety of mechanisms. what best describes how gene flow can occur?
An individual organism moves into a new population
What must occur within a gene pool before formation of a new species?
Answer: Reproductive Isolation
