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Ch 12 Genetics
Question | Answer |
---|---|
mitosis | cell's nucleus divides into two new nuclei, and one copy of DNA is distributed into each daughter cell |
genetics | the scientific study of heredity |
heredity | passing of physical characteristics from parents to offspring |
trait | each specific characteristic |
gene | factors that control a trait |
allele | a different form of a gene |
probability | how likely an event will occur |
Punnett square | chart that shows all possible ways alleles can combine in a genetic sequence |
phenotype | organism's physical appearance or visible trait |
genotype | organism's genetic makeup or alleles |
homozygous trait | organism that has two identical alleles for a trait |
heterozygous trait | organism that has two different alleles for a trait |
meiosis | the process by which the number of chromosomes is reduced by half as sex cells form |
nucleus | dense area in a cell that contains nucleic acid |
clone | an organism that has exactly the same genes as the organism from which it was produced |