Question

1. mitosis and meiosis are processes involved in cellular reproduction. which of the following describes and event that results from mitosis but not meiosis?

a) c. daughter cells that are identical to the parent cell b) b. replication of cellular genetic material
c) d. four daughter cells that are produced from each parent cell d) a. two stages of cell division

1. how are sexual reproduction and asexual reproduction different from each other?

a) c. mutation rates are lower in sexual reproduction than in asexual reproduction b) d. asexual reproduction occurs only in multicellular organisms
c) a. sexual reproduction requires two parents and asexual reproduction requires only one parent d) b. asexual reproduction requires two parents and sexual reproduction requires only one parent

1. which type of reproduction leads to increased genetic variation on a population?

a) c. sexual reproduction b) a. parthenogenesis
c) b. asexual reproduction d) d. vegetative reproduction

1. which of the following phrases best describes cancer?

a) d. presence of genetic defects caused by hereditary disorders b) a. absence of cyclins in the dna
c) c. uncontrolled cell growth caused by mutations in genes that control the cell cycle d) b. multiple gene mutations on a chromosome of dna

Explanation:

1. Mitosis produces 2 daughter cells identical to the parent cell; meiosis produces 4 non - identical daughter cells. Both involve genetic material replication and cell division stages.
2. Sexual reproduction needs 2 parents; asexual needs 1. Mutation rates aren't necessarily lower in sexual. Asexual occurs in unicellular too.
3. Sexual reproduction combines genetic material from 2 parents, increasing variation. Asexual (like parthenogenesis, vegetative) has less variation.
4. Cancer is uncontrolled cell growth due to mutations in cell - cycle - controlling genes. Genetic defects from heredity aren't the main description. Cyclins are present (mutated maybe). Multiple gene mutations on a chromosome is too vague compared to cell - cycle gene mutations.

Answer:

1. a) C. daughter cells that are identical to the parent cell
2. c) A. sexual reproduction requires two parents and asexual reproduction requires only one parent
3. a) C. Sexual reproduction
4. c) C. uncontrolled cell growth caused by mutations in genes that control the cell cycle