Question

The two alleles of a locus which an offspring receives from the male and female gametes are situated on

• A. Two different homologs of the same chromosome
• B. Two different chromosomes
• C. Sex chromosomes
• D. A single chromosome

Answer 1

Answer: (A)

Two different homologs of the same chromosome

Alleles are alternate forms or varieties of a gene. he alleles for a trait occupy the same locus or position on homologous chromosomes and thus govern the same trait. However, because they are different, their action may result in different expressions of that trait. Homologous chromosomes are paired during the production of of sex cells in meiosis. Such chromosomes are alike with regard to size and also position of the centromere. They also have the same genes, but not necessarily the same alleles, at the same locus or location.

So the correct option is 'Two different homologs of the same chromosome'.