autosome, in humans ther are 22 pairs, these code for similar traits, sex chromosomes, in humans there is 1 pair, these code for sexual traits, alleles, variations of a gene, you have 2 for each trait, you get 1 from each parent, Dominant Allele, represented by a Capital, always shows when present , Recessive Allele, represented by a lowercase, only shows when 2 recessive are present, Homogeneous , two of the same allele (AA), Heterogeneous, two different alleles (Aa), Genotype, the combination of alleles (Aa, aa, AA), Phenotype , the trait present (brown eyes, blue eyes).

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