click below
click below
Normal Size Small Size show me how
chapter 10
Term | Definition |
---|---|
chromosome | threadlike structure of DNA and protein that contains genetic info; in eukaryotes, found in the nucleus; in prokaryotes they are found in the cytoplasm |
chromatin | substance found in eukaryotic chromosomes that consists of DNA tightly coiled around histones |
cell cycle | series of events in which a cell grows, prepares for division, and divides to form two daughter cells |
interphase | period of the cell cycle between cell divisions |
mitosis | part of eukaryotic cell division during which the cell nucleus divides |
cytokinesis | division of the cytoplasm to form two separate daughter cells |
prophase | genetic material inside the nucleus condenses and duplicated chromosomes become visible |
centromere | region of a chromosome where the two sister chromatids attach |
chromatid | one of the two identical "sisters" parts of a duplicated chromosome |
centriole | structure in an animal cell that helps organize cell divison |
metaphase | chromosomes line up at the center of the cell |
anaphase | chromosomes move toward opposite poles |
telophase | chromosomes begin to spread out into a tangle of chromatin |
embryo | developing stage of a molecular organism |
differentiation | process in which cells become specialized in structure and function |
totipotent | cells that are able to develop into any type cell found in the body |
blastocyst | stage of early development in mammals that consists of a hollow ball of cells |
pluripotent | cells that are capable of developing into most, but not all, of the body's cell types |
stem cell | unspecialized cell that can give rise to one or more types of specialized cells |
multipotent | cell with limited potential to develop into many types of differentiated cells |
cell division | process by which cells divide into new daughter cells |
asexual reproduction | process of reproduction involving a single parent that results in offspring that are genetically identical to the parent |
sexual reproduction | type of reproduction in which cells from two parents must unite to form the first cell of a new organism |
cyclin | one of a family of proteins that regulates the cell cycle in eukaryotic cells |
growth factor | one of a group of external regulatory proteins that stimulate the growth and division of cells |
apoptis | process of programmed cell death |
cancer | disorder in which some of the body's cells lose the ability to control growth |
tumor | mass of rapidly dividing cells that can damage surrounding tissues |