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23 Cards in this Set

  • Front
  • Back
the sex cells from the mother and fther that form a new cell at conception
the new cell formed by the process of fertilization
the basic unit of genetic information
rod-shaped portions of DNA that are organized in 23 pairs
the underlying combination of genetic material present (not visible) in an organism
an observable trait
inheritance in which a combination of multiple gene pairs is responsible for the production of a particular trait
polygenic inheritance
genes that are considered recessive and located only on the X chromosome
x-linked genes
the study of the effects of heredity on behavior
behavioral genetics
a disorder produced by the presence of an extra chromosome on the 21st pair
down syndrome
a blood disorder that gets its name from the shape of the red blood cells in those who have it
sickle-cell anemia
a disease that produces blindness and muscle degeneration prior to death; there is no treatment
tay-sachs disease
a disorder resulting from the presence of an extra X chromosome that produces underdeveloped genitals, extreme height, and enlarged breasts
klinefelter's syndrome
patterns of arousal and emotionality that represent consistent and enduring characteristics in an individual
the process by which a sperm and an ovum join to form a single new cell
the first, and shortest stage, of the prenatal period, which takes place during the first 2 weeks following conception
germinal stage
a conduit between the mother and fetus, providing nourishment and oxygen via the umbilical cord
the period from 2 to 8 weeks following fertilization during which significant growth occurs in the major organs and body systems
embryonic stage
the stages that begins at about 8 weeks after conception and continues until birth
fetal stage
a developing child, from 8 weeks after conception until birth
the inability to conceive after 12-18 months of trying to become pregnant
a factor that produces a birth defect
a disorder caused by the pregnant mother consuming substantial amounts of alcohol during pregnancy
fetal alcohol syndrome