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| diagram illustrating the patterns of health and illness within a family; also called a genogram or family health tree |
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| gene-carrying structure found in the nucleus of a cell, composed of tightly wound molecules of DNA |
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| deoxyribonulceic acid (DNA) |
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| nucleic acid molecule that contains the encoded, heritable instructions for all of a cell's activities; DNA is the genetic material passed from one generation to the next |
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| sequence of DNA that encode a protein or other functional product; the unit of heredity |
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| any of the chromosomes (22 in humans) that do not contain genes that determine sex |
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| chromosome that include genes that determine sex |
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| alteration in the DNA sequence of a gene |
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| disease caused by a mutation within one gene |
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| disease caused by mutations in several genes |
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| disease caused by the interaction of genetic and environmental factors |
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| a person who has one copy of an autosomal recessive mutation; this person shows no signs of the disease on to his or her offspring |
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| test designed to detect a mutation that if present ensures hte eventual onset of symptoms |
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| test designed to detect mutation that if present increases the risk of developing a disease |
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