29. Which one of the following does NOT occur during meiosis? 7 A. Homologous ch

Question

29. Which one of the following does NOT occur during meiosis? 7 A. Homologous chromosomes synapse. Sister chromatid chromosomes move to the poles. E.Crossing-over takes place between homologous chromosomes. Chromosome number is reduced from diploid to haploid. . Cells genetically identical to the parental cell are produced. 30. In a cell undergoing mitosis, you observe that the chromosomes are away from the center of the cell and cytokinesis is beginning. Which phase of mitosis are you observing? . metaphase DOtelophase prophase anaphase 31. Which of these descriptions of interphase is NOT correct: A.Gl=growth of cell B.G2-prepare for division· C- s-synthesis of RN E. None are correct D. All are correct 32. How many sister chromatids are seen at mctaphase in a mitotic eell whose diploid number is 20? . 10 30 B. 40 20 . 33. Deamination of cytosine results in a base that is now changed to adenine thymine D. uracil guanine . cytosine 1

Explanation / Answer

Answer:

29). E). Cells genetically identical to the parental cells are produced

Explanation: Genetically identical cell would not be produced because exchange of genetic material in crossing over.

30). D. Telophase

Explanation: Chromosomes will appear at the two pole of the cell in Telophase and then cytokinesis occurs in the middle of the cell.

31). C). S= Synthesis of RNA

Explanation: It is not synthesis of RNA. It is synthesis of DNA.

32). B). 40

Explanation: Each chromosome consists of two chromatids. So 20 *2 = 40 chromatids are present in the cell.

33). B). Uracil

Explanation:

Cytosine can spontaneously undergo hydrolytic deamination, resulting in a uracil base

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