What gives rise to a new allele of a gene?

Mutation plays an important role in evolution. The ultimate source of all genetic variation is mutation. Mutation is important as the first step of evolution because it creates a new DNA sequence for a particular gene, creating a new allele.

What produces new alleles of genes?

Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism’s offspring).

What causes a new allele to appear?

Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism’s offspring).

Which of the following can introduce new alleles into a population’s gene pool?

These changes may be due to mutations, which can introduce new alleles into a population. In addition, new alleles can be introduced in a population by gene flow, which occurs during breeding between two populations that carry unique alleles.

How can gene flow result in changes in allele frequencies?

The introduction of new alleles through gene flow increases variability within the population and makes possible new combinations of traits. … Although gene flow does not change allele frequencies for a species as a whole, it can alter allele frequencies in local populations.

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How are new alleles formed quizlet?

How are new alleles formed? They are formed by mutations. Mutations are random changes. … A base substitution mutation, a change to the base sequence transcribed from mRNA, a change to the sequence of a polypeptide in hemoglobin.

Where do mutations occur?

Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses. Germ line mutations occur in the eggs and sperm and can be passed on to offspring, while somatic mutations occur in body cells and are not passed on.

What process creates new alleles in a population?

Mutation. Mutation is a source of new alleles in a population. Mutation is a change in the DNA sequence of the gene. A mutation can change one allele into another, but the net effect is a change in frequency.

Which of the following introduces new variation into a population?

Mutation and gene flow are both processes where new genetic variation is introduced into a population.

Which example best illustrates gene flow?

Which example best illustrates gene flow? A flock of migrating geese enters in the territory of another flock and begins interbreeding.

What produces gene flow?

Gene flow is the movement of genes into or out of a population. Such movement may be due to migration of individual organisms that reproduce in their new populations, or to the movement of gametes (e.g., as a consequence of pollen transfer among plants).

What produces gene flow quizlet?

Gene flow occurs when fertile individuals or their gametes (sex cells) migrate between populations. Gene flow tends to reduce genetic differences between populations. If it is extensive enough, gene flow can eventually mix neighboring populations into a single population with a common gene pool.

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What flows during gene flow?

Gene flow is also called gene migration. Gene flow is the transfer of genetic material from one population to another. Gene flow can take place between two populations of the same species through migration, and is mediated by reproduction and vertical gene transfer from parent to offspring.