Multiple choice

How do alleles differ from each other?

  1. By one or a few bases

  2. a heritable factor

  3. Based on the sex

  4. position on chromasome
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A Correct answer
Explanation

Alleles are alternative forms of a gene that differ by small variations in their DNA sequence. These differences typically involve one or a few nucleotide bases. These small sequence changes can result in different phenotypes (traits) while the alleles still code for versions of the same characteristic and occupy the same chromosomal position.

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