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Definition
| The transmission of traits from one generation to the next. |
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| Difference between members of the same species. |
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Definition
| The scientific study of heredity and hereditary variation. |
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Definition
| Discrete units of hereditary information consisting of a specific nucleotide sequence in DNA (or RNA, in some molecules) |
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Definition
| Threadlike, gene-carrying structures found in the nucleus. Contains one very long DNA molecule and associated proteins. |
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Definition
| A variant for a character. |
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Definition
| Any cell in a multicellular organism except a sperm or egg cell. |
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Definition
| Cells in multicellular organisms responsible for reproduction. |
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Definition
| Chromosomes that are not directly involved in determining sex, as opposed to sex chromosomes. |
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Definition
| One of a pair of chromosomes responsible for determining the sex of an individual. |
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Definition
| Plants that produce offspring of the same variety when they self-pollinate. |
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Definition
| The mating, or crossing, of two varieties. |
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Definition
| The parent individuals from which offspring are derived in studies of inheritance. |
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Definition
| The first filial, or hybrid, offspring in a genetic cross-fertilization. |
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Definition
| Offspring resulting from interbreeding of the hybrid F1 generation. |
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Definition
| An alternate version of a gene. |
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Term
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Definition
| In a heterozygote, the allele that is fully expressed in the phenotype. |
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Term
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Definition
| In a heterozygote, the allele that is completely masked in the phenotype. |
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Term
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Definition
| Mendel's first law, stating that allele pairs separate during gamete formation, and then randomly re-form as pairs during the fusion of gametes at fertilization. |
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Term
| Law of Independent Assortment |
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Definition
| Mendel's second law, stating that each allele pair segretages independently during gamete formation; applies when genes for two characteristics are located of different pairs of homologous chromosomes. |
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Term
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Definition
| Having two identical alleles for a given trait. |
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Definition
| Having two different alleles for a given genetic character. |
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Definition
| The physical and physiological traits of an organism. |
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Definition
| The genetic makeup of an organism. |
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Definition
| A type of inheritance in which F1 hybrids have an appearance that is intermediate between the phenotypes of the parental varieties. (pink snapdragons) |
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Definition
| A phenotypic situation in which the two alleles affect the phenotype in separate, distinguishable ways. (M, N, and MN blood groups) |
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Definition
| A situation in which gees exist in populations of more than two allelic forms. (ABO blood typing) |
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Definition
| The ability of a single gene to have multiple effects. |
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Definition
| A phenomenon in which one gene alters the expression of another gene that is independently inherited. |
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Term
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Definition
| An additive effect of two or more gene loci on a single phenotypic character. |
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