| A | B |
|---|
| Nuclear division that results in cells with one-half the normal number of chromosomes. | Meiosis |
| Nuclear division that results in daughter cells with exactly the same number and kind of chromosomes as the parent cell. | Mitosis |
| Nuclear division in somatic cells. | Mitosis |
| Nuclear division that produces gametes. | Meiosis |
| In a unicellular eukaryocyte, mitosis is equal to what type of reproduction? | Asexual |
| Appearance of chromosomes in a nucleus that is not dividing. | Chromatin material (granular mass) |
| Current estimate of number of genes a human has. | 35,000 to 45,000 |
| Number of chromosomes in human somatic cells. | 46 total-----23 pairs |
| Name for the entire period between cell divisions. | Interphase |
| First subdivision of interphase. | G1 |
| Subdivision of interphase in which DNA replication occurs. | S |
| Normal cell growth and activity occurs during which subdivision of interphase? | G1 |
| Subdivision of interphase just before division begins. | G2 |
| Centrioles divide during which subdivision of interphase? | S |
| Nucleolus disappears during this phase of mitosis. | Prophase |
| Nuclear envelope breaks down during this phase of mitosis. | Prophase |
| Mitotic apparatus is built during this phase of mitosis. | Prophase |
| Chromosomes condense during this phase of mitosis. | Prophase |
| Individual chromosomes become visible during this phase of mitosis. | Prophase |
| Chromosomes each consist of a pair of sister chromatids during which phases of mitosis? | Prophase and metaphase |
| Phase of mitosis in which spindle fibers attach to kinetochores. | Metaphase |
| Phase of mitosis in which all chromosomes line up on equator of mitotic spindle. | Metaphase |
| Phase of mitosis in which sister chromatids separate at centromeres and move to opposite poles. | Anaphase |
| Phase of mitosis in which daughter nuclei form. | Telophase |
| Division of the cytoplasm is called ___. | Cytokinesis |
| Cytokinesis occurs during which phase(s) of mitosis? | Late anaphase or telophase |
| Chromosomes are elongating. This must be which phase of mitosis? | Telophase |
| A pair of chromosomes, one from each parent, with similar size, shape, & genetic information is called a ___ pair. | Homologous |
| A cell that contains 2 of each kind of chromosome is said to be ___. | Diploid |
| A cell that contains one of each kind of chromosome is said to be ___. | Haploid |
| Gametes are (haploid or diploid). | Haploid |
| The zygote is (haploid or diploid.) | Diploid |
| Human somatic cells are (haploid or diploid). | Diploid |
| The process of meiosis involves ___ divisions with duplication of DNA occurring ___. | 2 / once (during the S phase of interphase before division begins) |
| Homologous chromosomes synapse during which phase of meiosis? | Prophase I |
| Crossing over occurs during which phase of meiosis? | Prophase I |
| The result of synapsis is the formation of ____. | Tetrads (bivalents) |
| The number of tetrads that forms in a cell is equal to the ___ number of chromosomes. | Haploid |
| The X-shaped region where crossing over has occurred is called a ___. | Chiasma (chiasmata is plural) |
| Paired homologs separate from each other (but sister chromatids are still attached) during which phase of meiosis? | Anaphase I |
| Tetrads line up on the equator during which phase of meiosis? | Metaphase I |
| Nuclear envelopes reform with sister chromatids attached to each other inside them during which phase of meiosis? | Telophase I |
| The brief resting period between meiotic divisions is called ___. | Interkinesis |
| Sister chromatids move to equator of cell during which phase of meiosis? | Metaphase II |
| Sister chromatids separate and move toward opposite poles during which phase of meiosis? | Anaphase II |
| Nuclear envelopes form around truly haploid nuclei during which phase of meiosis? | Telophase II |
| One germ cell that begins the process of meiosis would eventually form ___ sperm. | 4 |
| One germ cell that begins the process of meiosis would eventually form ___ eggs. | 1 |
| Separation of paired homologs during anaphase I is called ____. | Disjunction--remember this--if something goes wrong & they don't separate this is called nondisjunction and may be involved in genetic defects. |
