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| any of several forms of a gene, usually arising through mutation, that are responsible for hereditary variation. |
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| any chromosome other than a sex chromosome. |
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| of or pertaining to two different alleles that are fully expressed in a heterozygous individual. |
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| An allele or a gene that is expressed in an organism’s phenotype, masking the effect of the recessive allele or gene when present. |
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| the basic physical unit of heredity; a linear sequence of nucleotides along a segment of DNA that provides the coded instructions for synthesis of RNA, which, when translated into protein, leads to the expression of hereditary character. |
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| the genetic makeup of an organism or group of organisms with reference to a single trait, set of traits, or an entire complex of traits. |
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| having dissimilar pairs of genes for any hereditary characteristic. |
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| having identical pairs of genes for any given pair of hereditary characteristics. |
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| the appearance in a heterozygote of a trait that is intermediate between either of the trait's homozygous phenotypes. |
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| an ancestral line; line of descent; lineage; ancestry. |
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| the appearance of an organism resulting from the interaction of the genotype and the environment. |
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| the heredity of complex characters that are determined by a large number of genes, each one usually having a relatively small effect. |
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| A tool that helps to show all possible allelic combinations of gametes in a cross of parents with known genotypes in order to predict the probability of their offspring possessing certain sets of alleles. |
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| that one of a pair of alternative alleles whose effect is masked by the activity of the second when both are present in the same cell or organism. |
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| is a trait whose allele is located on the x chromosome. Most sex-linked traits are recessive. |
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