The table below shows the stage and number of cells and chromosomes per cell at the end of the stage in 2n= 72 organism. Stage Number of Cells Number of Chromosomes Prophase I 1 72 Metaphase I 1 72 Anaphase I 1 72 Telophase I 1 72 Beginning of Prophase II 2 36 Which of the following statements correctly describes the chromosomes in each daughter cell at the end of meiosis I? Each daughter cell contains 72 separate chromatids. Since every two chromatids were originally joined, forming one homologous chromosome, the number of chromatids is divided by two to determine the number of chromosomes. Each daughter cell contains 36 chromosomes, each composed of two chromatids. Each chromosome is one of a pair of homologous chromosomes from the parent cell, with the other homologue found in the other daughter cell. Each daughter cell contains 36 chromosomes, each composed of two chromatids. Since the chromosomes were randomly divided, one daughter cell may contain both of a pair of homologous chromosomes, while the other cell contains both of another pair of homologous chromosomes. Each daughter cell contains 36 chromatids. Each chromatid is one of two from a single chromosome with the other one of the pair found in the other daughter cell.
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At the conclusion of mitosis and cytokinesis, each daughter cell has: A. Unreplicated chromosomes and half the cytoplasm found in the parent cell B. Replicated chromosomes with DNA identical to the parent cell C. Twice the amount of DNA and half the cytoplasm of the parent cell D. DNA genetically different from the parent cell E. Twice the cytoplasm and the same amount of DNA as the parent cell Figure 1. Use the letters A – E to answer questions 2 through 4 below. 2. In Figure 1, DNA is in the chromatin form in which panel? (provide an answer A – E for question 2) 3. Anaphase is represented in which panel in Figure 1? (provide an answer A – E for question 3) 4. The pictures in Figure 1 depict some of the stages of mitosis. Put them in order from beginning to end of mitosis. A. A, C, E, B, D B. A, C, E, D, B C. A, B, C, D, E D. C, A, E, B, D E. C, E, B, D, A 5. The primary difference between mitosis and meiosis in animals includes all of the following except: A. the number of times chromosomes align at the metaphase plate. B. the number of times the DNA is replicated. C. the purpose of generating reproductive cells as opposed to generating somatic cells. D. the number of daughter cells that result (2 or 4). E. the generation of haploid cells (1n) from diploid cells (2n).
Adi S.
Read each statement, then write down the correct phase from the terms below that the statement describes. Interphase, Prophase I, Metaphase I, Anaphase I, Telophase I, Cytokinesis I, Prophase II, Metaphase II, Anaphase II, Telophase II, Cytokinesis II 1. homologous chromosomes line up in the center of the cell 2. the sister chromatids separate into individual chromosomes and move apart 3. 4 (N) haploid daughter cells form 4. the haploid number of chromosomes line up in the center of the cell 5. cells undergo DNA replication 6. nuclear membrane forms around 4 haploid nuclei 7. 2 (N) haploid daughter cells form 8. the nuclear membrane breaks down 9. the nuclear membrane reforms creating two cells each with 2 nuclei 10. crossing over (if any) occurs 11. nuclear membrane forms around pairs of sister chromatids 12. spindle fibers pull homologous pairs to opposite ends of the cell
Which of the following statements correctly identifies a key difference between mitosis and meiosis? (A) In metaphase of mitosis, replicated chromosomes line up in single file; in metaphase II of meiosis, replicated chromosomes line up on opposite sides of the metaphase plate. (B) $\quad$ During anaphase of mitosis, homologous chromosomes separate; during anaphase of meiosis I, sister chromatids separate. $(C)$ At the end of telophase of mitosis, the daughter cells are identical to each other; at the end of meiosis I, the daughter cells are identical to the parent cell. (D) During metaphase of mitosis, centromeres are present directly on the metaphase plate; during metaphase of meiosis I, there are no centromeres on the metaphase plate.
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