click below
click below
Normal Size Small Size show me how
8Sci CH14
8th Science CH14 Heredity
Term | Definition |
---|---|
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 |