12. The unlettered circle at the top of the accompanying figure shows a diploid nucleus with four chromosomes that have not yet replicated. The circles labeled 1 to 5 show various combinations of these chromosomes. Centromere II IV Which chromosomal configuration would be observed in a cell in prophase of mitosis? A. II В. II С. IV D. V

12. The unlettered circle at the top of the accompanying figure shows a diploid nucleus with four chromosomes that have not yet replicated. The circles labeled 1 to 5 show various combinations of these chromosomes. Centromere II IV Which chromosomal configuration would be observed in a cell in prophase of mitosis? A. II В. II С. IV D. V

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter8: Dna Structure And Function

Section: Chapter Questions

Problem 15SQ

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9. The unlettered circle at the top of the figure shows a diploid nucleus with four chromosomes that have not yet replicated. There are two pairs of homologous chromosomes, one long and the other short. One haploid set is black, and the other is gray. The circles labeled A to E show various combinations of these chromosomes. Centromere D E A) Which drawing represents prophase of mitosis? B) Which drawing represents one daughter nucleus at the end of telophase of mitosis? 10. Why do neurons and some other specialized cells divide infrequently? A) They no longer have active nuclei. B) They have entered into G0. C) They only have one set of chromosomes. 11. One difference between cancer cells and normal cells is that cancer cells A) are unable to synthesize DNA. B) are arrested at the S phase of the cell cycle. C) continue to divide regardless if they have the appropriate signals. D) cannot function properly because they can only divide when there is space. 12. The spindle checkpoint…
МЕТАРНASЕ Centrioles at opposite end of cell Spindle fibres attached to centromeres 46 double stranded chromosomes lined up along the metaphase plate Diploid cell 2n = ΑΝΑΡΗΑASE Centrioles at opposite poles Spindle fibres attaches to centromeres of the single stranded chromosomes 46 chromosomes get separated - 46 chromatids get pulled to each pole by spindle fibres Diploid cell 2n =
Arial 11 BIUA 田回▼ 三=三|三|: 12 II 4. Below is a diploid cell in meiosis. a. Label one set of homologous chromosomes, one set of sister chromatids and one set of heterologous chromosomes. b. How many alleles of the 'A' alleles are present in the cell at Prophase 1? c. How many copies of the 'A' genes are present in each cell at Prophase II? d. How many 'a' alleles are present in Anaphase 1? e. How many 'F' alleles are present in each cell in Metaphase I? f. How many 'f alleles are present in each cell in Metaphase ll? g. How many 'F' genes are present in each gamete? h. How many chromosomes will be present in each gamete? MacBook Air
23) Draw a cell with 4 pairs of homologous chromosomes (aka a diploid number of 8 (2n=8)) in anaphase of meiosis I. In your diagram, label the homologous chromosomes, sister chromatids, centromeres, and mitotic spindle.
__1. If an organism’s somatic cell has 2n=8, what will be the chromosome number of its gametes (undergo meiosis I and II)?
cell type: 9) Label the figure below. Chromosome number: cytokinesis by: division type: А- В- С- D- E- the halves the number of chromosomes, and at the same time, stage. The result is 10) daughter cells event that causes genetic diversity takes place in called (n? 2n?). An organism with two of each kind of chromosome is said to be: (3) tetraploid (1) haploid (2) diploid (4) polyploid. In multicellular organisms, mitosis results in: (1) reproduction (2) growth and repair (3) sperm and egg production (4) fertilization. If an organism produced an egg that had 20 chromosomes, the body cells of that organism should have: (1) 10 chromosomes (2) 20 chromosomes (3) 30 chromosomes (4) 40 chromosomes. 11) is what helps us grow and is why we are all unique! Human female karyotype contains .... (number) pairs autosomal and sex chromosomes. separate to go opposite poles in Anaphase in mitosis, while in Meiosis in AnaphaseI. (how many?) 12) If a diploid parent cell with 8 chromosomes (2n=8)…
29) Anaphase Il is essentially the same as mitotic anaphase except that in anaphase II and in mitotic anaphase D) the cells are haploid and sister chromatids separate... the cells have the same number of chromosomes as the original cell and sister chromatids separate the cells are diploid... the cells are haploid chromosomes line up double file in the middle of the cell.. chromosomes line up single file in the middle of the cell crossing over occurs... crossing over does not occur the cells are haploid and sister chromatids separate... the cells have the same number of chromosomes as the original cell and sister chromatids separate
24) 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? 10
3) The small beads (pink and blue) on the chomatids represent the segments of DNA that have been swapped between non-sister chromatids within a tetrad. What is the term for this exchange of genetic information that occurs in prophase 1? MEIOSIS I. Cytoplasm Nuclear membrane Nucleus Prophase I
Non-disjunction during melosis can lead to several chromosomal disorders. When can non-disjunction occur? Telophase lor Telophase II Cytokinesis )Anaphase I only Anaphase lonly )Anaphase I orAnaphasell
Centrioles at opposite end of cell Spindle fibres attached to centromeres 46 double stranded chromosomes lined up along the metaphase plate Diploid cell 2n = ANAPHASE Centrioles at opposite poles Spindle fibres attaches to centromeres of the single stranded chromosomes 46 chromosomes get separated - 46 chromatids get pulled to each pole by spindle fibres Diploid cell 2n =
1. Assume that a cell is 2n=2 (diploid has two chromosomes, the same size). DRAW the following stages below. Use / for unreplicated chromosome and X for replicated chromosome. Use a metaphase plate that is vertical. For simplicity, do not indicate the nuclear membrane, spindles or that the chromosomes are decondensed (unwound) in interphase. Draw the chromosomes even if you would actually only see chromatin during interphase For reference this is Metaphase of MITOSIS Metaphase of MEIOSIS I Metaphase of MEIOSIS II one gamete a. d. b. G1 е. C. G2 f. X а. b. С. d. е. f. 2. Carefully analyze the following images. A a. Describe each as n= (1 or 2 "sets" of information is held on how many chromosomes). Also indicate how much DNA is in each compared to a respective gamete which has 1x amount of DNA) Ploidy (2n or 1n?) 1n_ # of chromosomes 2 amount of DNA 1x_