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8Sci CH14

8th Science CH14 Heredity

DNA thread-like material making up the chromosomes within the cell nucleus; contains the master code that directs the cells in all their activities and passes on genetic information
dominant trait trait that seems to dominate, or cover up, a recessive trait
gene specific location on a chromosome; can be either dominant or recessive
heterozygote individual with one dominant and one recessive gene for a specific trait
pedigree diagrammatic tool used to trace the existence of a specific trait among generations of a family; an show whether a trait has a pattern of appearance or is occurring randomly
pure dominant trait resulting when the offspring receives the dominant form of a trait from each parent
pure recessive trait resulting when the egg and sperm of each parent contains the recessive form of a trait
recessive trait trait that seems to disappear but reappears in a future generation of offspring
sickle-cell anemia potentially fatal genetic disease in which the red blood cells are misshapen, are unable to carry as much oxygen as normal cells, and can become stuck in capillaries
trait inherited characteristics of an organism; traits passed from one generation to another in a family may be nearly identical or similar and are controlled by genes carried on chromosomes