Mendelian Genetics · Botany

The actual site of a gene on a chromosome is called its:

  1. Centromere
  2. Allele
  3. Phenotype
  4. Locus
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Correct answer: Locus

A locus (plural: loci) is the specific, fixed position on a chromosome where a particular gene or genetic marker is located. Alleles of the same gene always occupy the same locus on homologous chromosomes.

Difficulty: Medium Question 18 of 20

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