Question 17 Listen At metaphase of meiosis 1, the cells with have the same of sisters chromatids as cells from the same organism at metaphase of mitosis a) True b) False
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Genetics Question 17
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- QUESTION 8 Match the stages of mitotic cell division to the descriptions of those stages. ]chromosomes attach to spindle fibers across the middle of the cell chromosomes are not yet duplicated so chromosomes only look like a line, Jonly one pair of centrioles in cell A. Cytokinesis cell membrane is pinching in forming a peanut-shaped cell, daughter chromosomes reach the poles and new nuclear membranes are forming around them B. Anaphase C. Telophase D. Early Interphase the nuclear membrane is breaking down, chromosomes are condensing, centrioles are building microtubule "highways" (spindle fibers) E. Prophase chromosomes are duplicated so chromosomes look like an "X", two pairs of centrioles and double the amount of organelles fill the cell F. Late Interphase cell is dividing into two identical cells G. Metaphase daughter chromosomes are beginning their migration to the poles on spindle fibersQUESTION 13 Assume that a diploid cell (2N=8) contains 4 pairs of chromosomes (3 pairs of autosomes and 1 pair of sex chromosomes) designated as 1m, 1p, 2m, 2p. 3m, 3p, Xm, and Xp where "m" stands for maternal origin and "p" stands for paternal origin. If nondisiunction for the Xm chromosome ocurred in meiosis I, what will be a likely chromosomal composition of the resulting 2 daughter cells at the end of this cycle? O 1m, 2p, 3p, Xm, Xp AND 1p, 2m, 3m, Xm, Xp O 1m, 2p, 3p, Xm, Xp AND 1р, 2m, 3m O im, 1m, 2p, 2p, 3p, 3p, Xm, Xm, Xp, Xp AND 1p, 1p, 2m, 2m, 3m, 3m, Xm, Xm, Xp, Xp O 1m, 1m, 2p, 2p, 3p, 3p, Xm, Xm, Xp, Xp AND 1p, 1p, 2m, 2m, 3m, 3mQUESTION 5 Assume that the diploid number of a certain species is four chromosomes, two large and two small (2n=4). a) Of the following figures, which represents a 3n (triploid) cell in mitotic metaphase? XX XX XX A B D b) For each of the wrong answers from part (a) above, explain briefly why it cannot represent a triploid cell in mitotic metaphase. X x x X
- Question 5 If you are looking at the chromosomes in a dividing cell and notice that there are groups of four chromatids laying side-by-side waiting to be separated, you would know that the cell must be in Metaphase of Meiosis I S Phase of the cell cycle One of the phases of Mitosis Prophase of Meiosis IIQuestion 4 Consider a diploid organism with a diploid number of 30. Show your work and/or explain logic on all parts. a. How many total chromatids will be present in a typical cell at mitotic metaphase? b. How many tetrads are present in a metaphase I cell of meiosis? c. How many dyads are present in a metaphase II cell in meiosis? d. How many monads are expected in each product cell at the end of meiosis II?QUESTION 34 What would be predicted to be the most common cause of chromosome translocations in Meiosis? A. Incorrect resolution of chiasmata in Meiosis II B. single point mutations during Meiosis II C. nondisjunction events resulting from incorrect resolution of chiasmata in Meiosis I D. improper cleavage of the cohesion complex
- Question 3 Anna (who produces eggs) and Syed (who produces sperm), have a child with Down's syndrome that results from trisomy of chromosome 21. Using a microsatellite sequence on chromosome 21, you run a gel. The gel imaged is attached; darker bands indicate signals of twice the intensity. If a nondisjunction event occurred in Anna during meiosis I, which lane (A, B, C, D) best fits the genotype of their child? Explain your choice, clearly identifying why that lane is correct and why the other lanes are incorrect. Assume no recombination.QUESTION 10 Click directly on the chromosomal location named 2q22. You can click on either chromatid, but make sure you are clicking directly on the precise location. 3. 3 4 1 3 4 IMII ক - DQUESTION 5 Assuming mitosis is divided into prophase, prometaphase, metaphase, anaphase, and telophase, identify the events that take place in metaphase. The chromosomes move toward the equator by action of the kinetochore microtubules. The nucleolus disappears. U Centrioles replicate. The nuclear envelope disappears. Microtubules attach to kinetochores. All chromosomes are aligned on the metaphase plate. Sister chromatids split. Chromosomes condense. Spindle fibers form. Centrioles are migrating to opposite sides of the nucleus. QUESTION 6 Assuming mitosis is divided into prophase, prometaphase, metaphase, anaphase, and telophase, identify the events that take place in anaphase. Centrioles are migrating to opposite sides of the nucleus. Chromosomes decondense. The nuclear envelope reforms. The chromosomes move toward the equator by action of the kinetochore microtubules. All chromosomes are aligned on the metaphase plate. The nucleolus disappears. Sister chromatids split. Kinetochore…
- Question 2 "Independent assortment" refers to assortment of sister chromosomes at the metaphase plate in meiosis I assortment of sister chromatids at the metaphase plate in meiosis I assortment of sister chromatids at the metaphase plate in meiosis II assortment of homologous chromosomes at the metaphase plate in meiosis II assortment of homologous chromosomes at the metaphase plate in meiosis I A assortment of sister chromosomes at the metaphase plate in meiosis IIQUESTION 1 Consider a diploid species with a diploid number of 30. Show your work and/or explain logic on all parts. 2 How many chromatids would be found in a cell that is in Prophase II of meiosis? b fatpical dplod cel,in G of the cell cycle, from this species contains DNA with a mass of 10 picograms, how many picograms of DNA would be in a bypical gamete? For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUSParagraph Arial 14px In !!!Question 29 Which of the following is not characteristic of Metaphase Il of meiosis? O Sister chronatids are aligned on the metaphase plate. O Each cell is haploid. O There are half the number of tetrads as there were in Metaphase L O Each chromosome is comprised of two sister chromatids. Question 30 A drug that prevents would have a deleterious effect on the moverment of chomosomes during anaphase? O'shortening of mierotubules O nuclear chvelop breakdown 2 elongation of microtubules O førmåtion of centrosomes