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ASIAN-ST 396H Study Guide - Midterm Guide: Sister Chromatids, Telophase, Cytokinesis

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bluebeetle493
25 Aug 2015
School
UMASS-Amherst
Department
Asian Studies
Course
ASIAN-ST 396H
Professor
babylon

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Document Summary

Somatic cells (diploid- 46 chromosomes: during interphase (s-phase) 46 chromosomes (cid:0) 92 chromosomes, after mitosis you have 2 identical daughter cells with 46 chromosomes. Metaphase: sister chromatids line up on the metaphase plate. Anaphase- sister chromatids pulled apart and move towards opposite poles. Zygote: diploid fertilized egg (sperm and the ova fused) Meiosis 1: zygote makes two different haploid cells. The chiasmata is the place where the two chromatid segments are switched during crossing over. Metaphase 1: homologous chromosomes line up- form bivalent/tetrad. Random orientation, the tetrads line up in a random order. Anaphase: homologous chromosomes separate and go towards opposite poles. Non- disjunction, when the homologous pairs are unseparated and go to one pole. Meiosis 2: 4 unique daughter cells are created.

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40 Verified Answers

Related Questions

Which of the following is correctly matched?

Prophase I - Nuclear envelope reforms,nucleolus reappears, spindle apparatus disappears

Metaphase II - Homologous chromosomes align atthe equator (center) of the cell forming tetrads

Anaphase II - Sister chromatids are pulled toopposite poles of the cell by contraction of spindle apparatusmicrotubules

Cytokinesis - Division of the nucleus

Telophase I - Nuclear envelope fragments,nucleolus disappears, spindle apparatus forms

31.????? interphase A. cytoplasm divided between the two daughter cells

32.????? chromosomenumber B. final phase of mitosis; daughter nuclei form

33.????? chromatid C. sum total of chromosomes in all cells of a given

type

34.????? cytokinesis D. chromosomes condense and mitotic spindle

begins to form

35.????? metaphase E. chromosomes line up at spindle equator

36.????? alleles F. sister chromatids separate, move to opposite

spindle poles now

37.????? prophase G. none between meiosis I and II

38.????? telophase H. half of a chromosome in prophase

39. ????? anaphase I. different molecular forms of the same gene

Matching

Determine whether the following applies to mitosis, meiosis, orboth; also identify the specific stage of cell division thatapplies (e.g. mitosis prophase, meiosis anaphase II, etc)



1) chromosomes pairs line up across the center of the cell


2) sister chromatids seperate


3) spindle fibers separate homologous chromosomes


4) 4 haploid daughter cells are produced


5) a cell 1st undergoes DNA replication


6) chromosomes line up single file across the middle of thecell


7) sister chromatids separate from each other


8) 2 haploid daughter cells form


9) the nuclear membrane re forms


10) spindle fibers attach to pairs of homologous chromosomes


11) the nuclear membrane begins to dissolve


12) centrosomes duplicate


13) synapsis and crossing over occurs


14) 2 diploid daughter cells form