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Health For Living
Chapter 2
14
Other
Undergraduate 3
11/24/2008

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Term
pedigree
Definition
diagram illustrating the patterns of health and illness within a family; also called a genogram or family health tree
Term
chromosome
Definition
gene-carrying structure found in the nucleus of a cell, composed of tightly wound molecules of DNA
Term
deoxyribonulceic acid (DNA)
Definition
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
Term
gene
Definition
sequence of DNA that encode a protein or other functional product; the unit of heredity
Term
allele
Definition
alternate form of a gene
Term
autosome
Definition
any of the chromosomes (22 in humans) that do not contain genes that determine sex
Term
sex chromosome
Definition
chromosome that include genes that determine sex
Term
mutation
Definition
alteration in the DNA sequence of a gene
Term
single-gene disorder
Definition
disease caused by a mutation within one gene
Term
polygenic disorder
Definition
disease caused by mutations in several genes
Term
mutlifactorial disorder
Definition
disease caused by the interaction of genetic and environmental factors
Term
carrier
Definition
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
Term
presymptomatic test
Definition
test designed to detect a mutation that if present ensures hte eventual onset of symptoms
Term
predispositional test
Definition
test designed to detect mutation that if present increases the risk of developing a disease
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