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Question

Which of the following statements about alleles is not true?


A

There may be several at a locus

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B

One may be dominant over another

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C

They may show incomplete dominance

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D

They occupy different loci on the same chromosome

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Solution

The correct option is D

They occupy different loci on the same chromosome


In genetics, an allele is an alternative form of a gene. Usually, a single pair of alleles controls a character or trait. In a pair of alleles, one may be dominant over the other ( e.g. any one character studied by Mendel). Alleles always occupy the same position/locus on the homologous chromosomes. Therefore, the last statement is false in this case.


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