Question

drag the labels to their correct positions on this figure of a human chromosome. locus homologue allele

Explanation:

• Homologue: The red and purple chromosomes are homologous chromosomes (homologues). Homologous chromosomes are pairs of chromosomes (one from each parent) that have the same length, gene position, and centromere location.
• Locus: The position of a gene on a chromosome is called a locus. For example, the position of the \(P\) gene (in the pink band) on both chromosomes is a locus.
• Allele: Alleles are alternative forms of a gene. For example, the \(c\) (on the purple chromosome) and \(C\) (on the red chromosome) are alleles.

Answer:

• The label “homologue” goes to the box that encompasses the red chromosome (as it is the homologue of the purple chromosome).
• The label “locus” goes to the box that points to the \(P\) (or any single gene - position on the chromosome, as locus is the gene’s location).
• The label “allele” goes to the box that points to \(c\) and \(C\) (or other gene - pairs like \(b\) - assuming no variation there, but \(c/C\) is a clear allele example).