An allele is an alternate form of a gene that is located from a specific position on a specific chromosome.

Any chromosome other than a sex chromosome.

Any of several threadlike bodies, consisting of chromatin, that carry the genes in a linear order: the human species have 23 pairs, designated 1 to 22 in order of decreasing size and X and Y for the female and male sex chromosomes respectively.

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Term	Definition
Allele	An allele is an alternate form of a gene that is located from a specific position on a specific chromosome.
Autosome	Any chromosome other than a sex chromosome.
Chromosome	Any of several threadlike bodies, consisting of chromatin, that carry the genes in a linear order: the human species have 23 pairs, designated 1 to 22 in order of decreasing size and X and Y for the female and male sex chromosomes respectively.
Dominant trait
Gene	the basic unit of heredity