Question

Which of the following statements about alleles is not true?

• A. There may be several at a locus
• B. One may be dominant over another
• C. They may show incomplete dominance
• D. They occupy different loci on the same chromosome

Answer 1

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.