1. A) Which of the following best describes metaphase? a.) chromosomes attach to the spindle fibers b.) chromosomes uncoil c.) chromosomes meet in the middle of the cell d.) chromosomes separate e.) chromosomes coil up f.) chromosomes duplicate g.) crossing over occurs 2. B) What happens in prophase I but not in prophase II? a.) the nuclear envelope reappears b.) DNA Polymerase c.) spindle formation occurs d.) crossing over occurs e.) homologous chromatids coil f.) the number of chromosomes doubles g.) sister chromosomes uncoil h.) chromosomes move to the middle of the cell 3. C) A chromosome that has gone through S phase but not mitosis consists of what? a.) two homologous chromatids b.) two homologous chromatids joined by a centromere c.) two sister chromosomes joined by a centromere d.) two homologous chromosomes joined by a centromere e.) two sister chromatids f.) two homologous chromosomes g.) two sister chromatids joined by a centromere 4. D) What is the best explanation for a DdEe Ă— ddee cross producing offspring in a 6:6:2:1 phenotypic ratio? a.) linkage b.) codominance c.) natural selection d.) pleiotropy e.) epigenetics f.) complete dominance g.) incomplete dominance
Added by Robert C.
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Therefore, the correct answer to the first question is c.) chromosomes meet in the middle of the cell. Step 2: Distinguishing Prophase I from Prophase II - Prophase I and Prophase II are stages in meiosis. The key event that happens in Prophase I but not in Show more…
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1. Which stages of mitosis involve the meiotic spindle? Select one: a. Prophase, metaphase, anaphase, and telophase b. Prophase, metaphase, and anaphase only c. Interphase and all stages of the mitotic phase d. None of the above 2. The end result of meiosis is: Select one: a. Two identical haploid daughter cells b. Four genetically different diploid daughter cells c. Four genetically identical haploid daughter cells d. Four genetically distinct haploid daughter cells 3. During what phase does independent assortment occur? Select one: a. Metaphase I b. Anaphase I c. Telophase I d. None of the above 4. Which of the following is true concerning somatic cells? Select one: a. Any cell, prokaryotic or eukaryotic, which is not an egg or sperm cell b. Sperm and egg cells c. All eukaryotic cells, excluding sperm and egg cells d. In a multicellular eukaryotic organism, all cells excluding sperm and egg cells 5. What powers the movement of chromosomes during mitosis? Select one: a. Microfilaments b. Microtubules c. Myosin d. Centrosomes 6. Which stage of mitosis involves the separation of sister chromatids? Select one: a. Anaphase b. Metaphase c. Prophase d. Telophase 7. What separates during Anaphase I? Select one: a. Homologous chromosomes b. Sister chromatids c. Non-sister chromatids d. Chromosome tetrads
Caryl A.
1) The centromere is a region in which A) new spindle microtubules form at either end. B) chromosomes are grouped during telophase. C) the nucleus is located prior to mitosis. D) chromatids remain attached to one another until anaphase. E) metaphase chromosomes become aligned at the metaphase plate. 2) If there are 20 chromatids in a cell, how many centromeres are there? A) 80 B) 10 C) 30 D) 40 E) 20 3) Which is the longest of the mitotic stages? A) anaphase B) telophase C) prometaphase D) metaphase E) prophase 4) A cell containing 92 chromatids at metaphase of mitosis would, at its completion, produce two nuclei each containing how many chromosomes? A) 92 B) 16 C) 23 D) 46 E) 12 5) Cytokinesis usually, but not always, follows mitosis. If a cell completed mitosis but not cytokinesis, the result would be a cell with A) two nuclei but with half the amount of DNA. B) a single large nucleus. C) two nuclei. D) two abnormally small nuclei. E) high concentrations of actin and myosin. 6) The formation of a cell plate is beginning across the middle of a cell and nuclei are re-forming at opposite ends of the cell. What kind of cell is this? A) an animal cell undergoing cytokinesis B) an animal cell in telophase C) an animal cell in metaphase D) a plant cell undergoing cytokinesis E) a plant cell in metaphase 7) Chromosomes first become visible during which phase of mitosis? A) metaphase B) prometaphase C) telophase D) prophase E) anaphase
Madhur L.
Describe what happens to the tetrads after they form. a. Prophase I of meiosis forms the tetrads. They line up at the midway point between the two poles of the cell to form the metaphase plate. There is equal chance of a microtubule fiber to encounter a maternally or a paternally inherited chromosome. Orientation of each tetrad is independent of the orientation of other tetrads. b. Prophase II of meiosis forms the tetrads. They line up at the midway point between the two poles of the cell to form the metaphase plate. There is equal chance of microtubule fiber to encounter maternally or paternally inherited chromosome. Orientation of each tetrad is independent of the orientation of other tetrads. c. Prophase I of mitosis forms the tetrads. They line up at the midway between the two poles of the cell to form the metaphase plate. There is equal chance of a microtubule fiber to encounter a maternally or a paternally inherited chromosome. Orientation of each tetrad is independent of the orientation of other tetrads. d. Prophase I of meiosis forms the tetrads. They line up at the midway between the two poles of the cell to form the metaphase plate. There is a chance of microtubule fiber to encounter maternally inherited chromosome. Orientation of each tetrad is independent of the orientation of other tetrads.
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