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- Which statement best describes the genetic content of the two daughter cells in prophase II of meiosis? haploid with one copy of each gene haploid with two copies of each gene diploid with two copies of each gene diploid with four copies of each geneWhen Paramecium conjugate: a. cytoplasmic division produces four daughter cells, eachhaving two micronuclei and two macronuclei. b. one haploid micronucleus in each cell remains intact; theother three degenerate. The micronucleus of each cell divides once, producing two nuclei, and each cell exchanges one nucleus with the other cell. In each partner the two micronuclei fuse, forming a diploid zygote micronucleus in each cell. c. the micronucleus of each of the disengaged partners divides meiotically. Macronuclei divide again in each cell, and the original micronucleus breaks down. Each cell has two haploid micronuclei; one of the macronuclei develops into a micronucleus. d. the mating cells join together at opposite sites of their oral depression. e. the micronucleus in each cell undergoes mitosis. When mitosis is complete, there are four diploid macronuclei; the micronucleus then breaks down.Match the phase of cell division with the following diagrams. In these cells, 2n = 4. a. anaphase of meiosis I b. interphase of mitosis c. metaphase of mitosis d. metaphase of meiosis I e. metaphase of meiosis II
- The mitotic spindles arise from which cell structure? centromere centroscme kinetochore cleavage furrow24) How many DNA molecules (double helices) are present in this cell on the right? What is the haploid number of this cell? Is this cell haploid or diploid? 10If a parent cell of a sexually-reproducing species has 28 chromosomes, the number of chromosomes in the zygote would be 14. 28. 56. 112. impossible to determine with the information given. A tetrad is composed of two chromosomes with two sister chromatids each. two sister chromatids with separate centromeres. four chromosomes with two sister chromatids each. four sister chromatids are attached at a common centromere. QUESTION 3 During crossing-over genetic material is exchanged between sister chromatids, resulting in new combinations of alleles. genetic material is exchanged between non-sister chromatids, resulting in new combinations of alleles. sister chromatids from each homologous chromosomes of a tetrad are exchanged, resulting in new combination of alleles. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations…
- In Coleus , the somatic cells are diploid with 24 chromosomes. How many of each of the following is present in each cell at the stage of mitosis and meiosis indicated below? kinetochore at prophase chromosomes at anaphase chromatids at metaphase 1 chromosomes at telophase after cytokinesis centromeres at anaphase chromosomes at telophase II after cytokinesis centromere at anaphase I chromatids at metaphaseIth the description: Homologous chromosomes line up in pairs along the metaphase plate. 1. Telophase II followed by cytokinesis Crossing over occurs between homologous chromosomes. 2. Metaphase I 3. Anaphase I| Four haploid, genetically unique cells are formed. 4. Prophase I Homologous chromosomes are separated. 5. Anaphase I Sister chromatids are separated. >6 - The meiotic cell cycle involves number of cell division(s) and number of DNA replication(s). a) two; zero b) O two; two C) O one; one d) O one; two e) two; one
- 1.What phase of mitosis is this? 2.What is the indicated structure 1? chromosome chromosome with two sister chromatids centrioles/centrosome spindle fibres metaphase plate 3.If the diploid (2n) number of this cell is 8 how many chromosomes are present Answer. 4.If the diploid (2n) number of this cell is 8 how many sister chromatids are present Answer. 5.If the diploid (2n) number of this cell is 8 how many homologous pairs are present Answer.Match the phases of meiosis with the correct description Metaphase I [ Choose ] [Choose ] Sister chromatids line up along the center of the cell. Cytokinesis produces four unique daughter cells, spindle dissolve, and the nuclear envelope reappears. Spindle fibers pull homologous pairs of chromosomes apart. Nuclear envelopes of daughter cells dissolve, and chromosomes condense. Spindle fibers pull sister chromatids apart. Homologous pairs of chromosomes line up at the center of the cell in tetrads. Cytokinesis produces two daughter cells, spindle dissolves, and nuclear envelope reappears. Nuclear envelope dissolves, DNA condenses and crossing over occurs. Anaphase II Prophase I Telophase I [Choose ] Prophase II [ Choose ] Telophase II [ Choose ] Anaphase I [ Choose ] Metaphase II [ Choose ] > > >Which of the following statements are true regarding mitosis in humans? 23 pairs of homologous chromosomes are separated four haploid gametes are produced in males 46 pairs of homologous chromosomes are separated two genetically identical daughter cells are produced 23 pairs of sister chromatids are separated 46pairs of sister chromatids are separated 1 haploid gamete and 2 polar bodies are produced in females
