24) The stage of meiosis during which tetrads align in the center of the cell is

Question

24) The stage of meiosis during which tetrads align in the center of the cell is: a. prophase I o. metaphase Ie anaphase d prophase II -25) The stage of meiosis during which centromeres divide and sister chromatids are opposite sides of the cell is: a. anaphase I b. metaphase c. anaphase I1d. prophase II 26) What is synapsis? The binding together of sister chromatids during the S stage of interphaseos b. The binding together of homologous chromosomes during prophase of mitosis c. A chromosomal anomaly that causes Down syndrome d. The binding together of homologous chromosomes during prophase I of meiosis 27) The stage of meiosis during which homologous chromoso mes are pulled to opposite sides of the cell is: a. anaphase I b. metaphase I c anaphase II d. prophase II 28) The stage of meiosis during which a cleavage furrow appears, producing four haploid daughter cells with chromosomes consisting of single chromatids: a. telophase b telophase II c. metaphase II d, telophase I 29) What is the name of the resting phase between the two meiotic divisions? a. cytokinesis b. interphase c. interkinesis d. none of the above 30) What is the name of the cell produced during oogenesis that's essentially just a nucleus surrounded by a cell membrane, with no cytoplasm? b. secondary oocyte c. polar body d. gamete a. oocyte 31) What do we call the condition in which an organism's cells contain more than two entire sets a. polyploidy 32) What do we call the condition in which an organism's cells contain two sets of chromosomes b. ancuploidy c. dislocation d. duplication with the exception of one chromosome type, of which there are either three or only one? a. polyploidy b) aneuploidy c. dislocation d. duplication 33) What is Down Syndrome? a. Trisomy 13 b. Monosomy 13 cMonosomy 12 d. Trisomy 21 34) What did Mendel mean by the FI generation? a. the original organisms to be hybridized b. the parent generation c. the grandchildren of the parent generation d. the offspring of the parent generation

Explanation / Answer

24. b. Metaphase-I. During Metaphase-I of meiosis the homologous chromosomes arrange themselves on the equatorial plate.

25. c. Anaphase-II. The centromere splits an sister cromachrom separate during this stage.

26. d. The binding together of homologous chromosomes during prophase I of meiosis.

27. a. Anaphase-I

28. b. Telophase-II

29. c. Interkinesis

30. c. Polar body

31. a. Polyploidy. It means possession of more than two whole sets of chromosomes. It occurs due to nondisjunction.

32. b. Aneuploidy. It is a condition when there is abnormal number of chromosomes which is more or less. Like 45 or 47 chromosomes in human instead of 46.

33. d. Trisomy 21

34. d. The offsprings of the parent generation.

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