locus
Quick Summary
A locus is a specific site or location, often used in genetics to refer to the position of a gene or allele on a chromosome. Think of it as an address for genetic information.1
Alleles are different versions or variants of a gene. Each gene is found at a specific locus, and an individual inherits two copies of each gene, one from each parent. If these two copies are different, they are called alleles. These variations can lead to different observable traits, known as phenotypes. For example, a gene for flower color might have alleles for purple or white flowers.23
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