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Alleles are different phenotypic expressions of a singular genotype. True or False ?

Alleles are different phenotypic expressions of a singular genotype. True or False ?

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True, Alleles are variant form of a given gene ,it is one of two or more versions of a known mutation at the same place on a chromosome.It can also refer to different sequence variations for a several hundred base pair or more region of the genome that codes for a protien. Sometimes different Alleles can result in different observable phenotypical traits such as different pigmentation .however most Alleles results in little or no observable phenotypic variations. If both Alleles of a gene at the locus on the homologous chromosomes are same,they and the organism are homozygous with respect to that gene.

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