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What are alleles?

What are alleles?

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Asked by Jameson, Last updated: Dec 02, 2021

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M. Kennedy

M. Kennedy

M. Kennedy
M. Kennedy, Web Content Writer, Denver

Answered Feb 20, 2019

Alleles are variants of the same gene that occur on the same place on a chromosome. They are alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.

Alleles are variants of the same gene that occur on the same place on a chromosome. They are
If the alleles at a gene locus on the homologous chromosomes are the same, then that organism is homozygous with respect to that gene. If the alleles are different, then they and the organism are heterozygous with respect to that gene. A given gene may have multiple different alleles, though only two alleles are present at the gene’s locus in any individual.

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John Smith

John Smith

John Smith
John Smith

Answered Sep 08, 2016

1. alleles are found at the same locus on chromosomes. -part of the definition of alleles is that they are alternative forms of a gene. alleles therefore must be found at that genes locus. choice a. is incorrect; multiple alleles are common in populations. choice c. is incorrect and misleading; it is true only of diploid cells.

1. alleles are found at the same locus on chromosomes. -part of the definition of alleles is that
haploid cells (gametes, haploid somatic cells from organisms such as mosses), of course, cannot possess more than one allele of a gene. choice d. is incorrect, since even a diploid individual is restricted to possessing two different alleles of a gene. choice e. is completely false.

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