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| another name for a homozygous individual; the organism may be homozygous dominant or homozygous recessive |
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| Having two different alleles for a trait. |
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| Having two copies of the same kind of allele, either two dominant or two recessive alleles. |
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| Having two different alleles, one dominant and one recessive. |
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| A trait that is always expressed in the phenotype when one or more alleles is present in the genotype. |
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| The trait that is expressed in the phenotypes only when no copies of the dominant allele are present. |
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| Alternate forms of one gene that are responsible for traits passed from parents to offspring. |
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| Segments of DNA that carry hereditary instructions and are passed from parent to offspring; located on chromosomes. |
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| The coiled and condensed form of DNA that appears during cell reproduction and division. Humans have 46, arranged in 23 pairs. |
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| Hereditary material that controls all the activities of a cell and contains the information to make new cells and proteins. |
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| Reproduction involving two parents and resulting in offspring that is genetically different from either parent. |
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| Reproduction in which a single parent produces offspring that are genetically identical to the parent |
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| Cell division that produces two clones or cells identical to the parent cell. |
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| Cell division that produces sex cells each having half the amount of genetic material of a typical body cell. |
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| The inherited combination of alleles; represented by alphabetic letters. |
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