click below
click below
Normal Size Small Size show me how
heridity
unit 2 words
| Term | Definition |
|---|---|
| DNA | The genetic material in cells |
| Chromosomes | in the early stage of cell divison, the chromatin is compacted into visable structures called chromosomes |
| cell cycle | The life cycle of an organism includes birth,grothy,reproduction, and death |
| interphase | part of the cell cycle during which the cell is not dividing |
| mitosis | is the part in eukaryotic cell cell cycle during which the nucleus divides |
| cytokinesis | divison of parent cells cytoplasm |
| homologous chromosomes | chromosomes that have the same sequence of genes and the same struvture |
| meiosis | type of cell division that produces haploid sex cells such as eggs and sperm cells |
| asexual reproduction | one organism produces one or more new organisms that are identical to itslef |
| sexual reproduction | when two parents each contirbute a sex cell tp the new organism |
| fertilization | when a sperm cell and egg join tougher |
| heredity | the passing of genetic material from parents to offspring |
| gene | segments of DNA found in chromsomes that give instrutions for producing a certin characteristic |
| allele | the diffrent versions of a gene |
| genotype | the combination of alleles that you inherited from your parents |
| phenotype | your observable traits |
| dominant | the allele cotributes to the phenotyype if one or more copies are present in genotype |
| recessive | the allele contributes to the phenotype only when when two copies of it are present |
| incomplete dominance | each allele in a hetrozygous individual infulnces the phenotype |
| codominance | both of the alleles in a heterozygous individual contribute to the phenotype |