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Week 8 Part 2
Biology, Ch. 10, Second set of vocabulary
| Question | Answer |
|---|---|
| Haploid | a cell that contains only a single set of chromosomes and therefore only a single set of genes |
| meiosis | Process by which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell |
| Tetrad | structure containing 4 chromatids that forms during meiosis |
| Crossing over | process in which homologous chromosomes exchange portions of their chromatids during meiosis |
| nondisjunction | error in meiosis when homologous chromosomes fail to separate |
| Diploid | a cell that contains both sets of homologous chromosomes |
| cytokinesis | division of the cytoplasm during cell division |
| internal regulators | proteins that respond to events inside the cell |
| external regulators | proteins that respond to events outside the cell; can speed up or slow down the cell cycle |
| cyclins | one of a family of closely related proteins that regulate the cell cycle |
| Cancer | disorder in which some of the body’s own cells lose the ability to control growth |
| homologous | chromosomes that each have a corresponding matching chromosome from the opposite sex parent |