Alleles (ALL-EELS') are just variations at a particular site on a chromosome. Since each chromosome has a similar chromosome partner (except for males with their X and Y chromosomes) each locus is duplicated. Loci can vary a bit. If a person has two identical versions of the locus, they are said to be homozygous (HOMO-Z-EYE'-GUS). If there is a difference, they are said to be heterozygous (HETERO-Z-EYE'-GUS).
Sunday, April 18, 2010
Alleles
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