Term
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Definition
| observable characteristics |
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Term
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Definition
| alternate forms of a gene |
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Term
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Definition
| alleles of one gene separate into gametes randomly with respect to alleles of other genes |
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Term
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Definition
| reproductive cells containing only one copy of each gene |
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Term
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Definition
| the heritable entity that determines a characteristic |
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Term
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Definition
| the separation of the two alleles of a gene into different gametes |
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Term
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Definition
| an individual with two different alleles of a gene |
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Term
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Definition
| the allele expressed in the phenotype of the heterozygote |
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Term
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Definition
| offspring of the P generation |
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Term
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Definition
| the cross of an individual of ambiguous genotype with a homozygous recessive individual |
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Term
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Definition
| the alleles an individual has |
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Term
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Definition
| the allele that does not contribute to the phenotype of the heterozygote |
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Term
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Definition
| a cross between individuals both heterozygous for two genes |
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Term
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Definition
| having two identical alleles of a given gene |
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Term
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Definition
| the alleles of one gene mask the effects of alleles of another gene |
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Term
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Definition
| genes whose alleles alter phenotypes produced by the action of other genes |
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Term
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Definition
| a genotype that is lethal in some situations (for example, high temperature) but viable in others |
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Term
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Definition
| environmental conditions that allow conditional lethals to live |
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Term
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Definition
| less than 100% of the individuals possessing a particular genotype express it in their phenotype |
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Term
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Definition
| a trait produced by the interaction of alleles of at least two genes or from interactions between gene and environment |
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Term
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Definition
| the heterozygote resembles neither homozygote |
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Term
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Definition
| both parental phenotypes are expressed in the F1 hybrids |
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Term
| histocompatibility antigens |
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Definition
| cell surface molecules that are involved in the immune system and are highly variable |
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Term
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Definition
| a heritable change in a gene |
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Term
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Definition
| one gene affecting more than one phenotype |
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Term
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Definition
| individuals with the same genotype have related phenotypes that vary in intensity |
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Term
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Definition
| one diploid cell gives rise to four haploid cells |
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Term
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Definition
| haploid germ cells that unite at fertilization |
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Term
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Definition
| the array of chromosomes in a given cell |
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Term
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Definition
| one diploid cell gives rise to two diploid cell |
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Term
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Definition
| the part of the cell cycle during which the chromosomes are not visible |
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Term
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Definition
| an animal cell containing more than one nucleus |
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Term
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Definition
| pairing of homologous chromosomes |
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Term
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Definition
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Term
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Definition
| division of the cytoplasm |
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Term
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Definition
| the time during mitosis when sister chromatids separate |
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Term
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Definition
| one of the two identical halves of a replicated chromosome |
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Term
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Definition
| chromosomes that do not differ between the sexes |
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Term
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Definition
| connection between sister chromatids |
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Term
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Definition
| microtubule organizing centers at the spindle poles |
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Term
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Definition
| cell produced by meiosis that does not become a gamete |
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Term
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Definition
| cells in the testes that undergo meiosis |
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