1. Ten centromeres are observed in a prophase cell from a Sorghum bicolor plant. a. How many pairs of chromosomes does this plant contain? b. For each stage of mitosis, indicate the number of centromeres you would expect to find and the number of copies of chromosomes attached to each centromere. Stage of mitosis: Number of centromeres visible per cell Number of chromosomes copies attached to centromere Prophase Anaphase

1. Ten centromeres are observed in a prophase cell from a Sorghum bicolor plant. a. How many pairs of chromosomes does this plant contain? b. For each stage of mitosis, indicate the number of centromeres you would expect to find and the number of copies of chromosomes attached to each centromere. Stage of mitosis: Number of centromeres visible per cell Number of chromosomes copies attached to centromere Prophase Anaphase

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter14: Dna Structure And Replication

Section: Chapter Questions

Problem 11TYK: Discuss Concepts Eukaryotic chromosomes can be labeled by exposing cells to radioactive thymidine...

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Metaphase in mitosis is similar to what stage in meiosis? a. prophase I b. prophase II c. metaphase I d. metaphase II e. crossing-over
Discuss Concepts Eukaryotic chromosomes can be labeled by exposing cells to radioactive thymidine during the S phase of interphase. If cells are exposed to radioactive thymidine during the S phase, would you expect both or only one of the sister chromatids of a duplicated chromosome to be labeled at metaphase of the following mitosis (see Section 10.2)?
Normal events in mitosis gives rise to daughter cells with exactly the same chromosome number and genetic material. What may be expected to happen chromosomally and genetically to: 1. a cell with a chromosome that contains two centromeres?
A cell has a diploid number of 12 (2n=12)a) how many chromosomes are present in a daughter cell after meiosis I? b) how many chromatids are present in a daughter cell after meiosis I?c) how many chromosomes are present in a daughter cell after meiosis II? d) how many chromatids are present in a daughter cell after meiosis II? e) how many chromosomes are present in a daughter cell after mitosis?
Using the symbols above: 1. Given: Adult diploid cell (2n = 8) 2. Show the condition of the chromosomes in the following Mitosis phases (illustrate): a. prophase b. metaphase c. anaphase d. telophase/cytokinesis
Prophase I in meiosis and Prophase in mitosis have a number of important differences, which of the answers below are one of those differences? a. Prophase I has fewer chromatids than Prophase b. Prophase only occurs in plant cells unlike Prophase I c. Prophase 1 has paired homologous chromosomes which Prophase does not d. Prophase has tetrad/bivalent structures while Prophase I does not
Which type(s) of cell division (mitosis, meiosis I,meiosis II) reduce(s) the chromosome number byhalf? Which type(s) of cell division can be classifiedas reductional? Which type(s) of cell division can beclassified as equational?
All of the following is significant application of mitosis except. a. Cloning b. Budding c. Formation of Gametes d. Stem Cell Regeneration If 6 cells undergoing celll division has 12 chromosomes, how many chromosome will there be in the daughter cells after mitosis and meiosis II respectively? a. 6 and 12 b. 12 and 6 c. 6 and 3 d. 6 and 6 In meiosis, the number of chromosomes of the mother cell compared to the resultant daughter cell's chromosome is A. doubled B. halved C. tripled D. the same Elongation of the cell undergoing the last phases of mitosis is due to A. movement of the chromosomes to the opposite poles B. increase in the volume of the cytoplasm that should be contained C. depolymerization of the spindle fibers connected to the kinetochore D. polymerization of the spindle fibers not connected to the kinetochore
Somatic cells of chimpanzees contain 48 chromosomes.How many chromatids and chromosomes are present at: (a) anaphase of mitosis, (b) anaphase I ofmeiosis, (c) anaphase II of meiosis, (d) G1 priorto mitosis, (e) G2 prior to mitosis, (f) G1 prior tomeiosis I, and (g) prophase of meiosis I?How many chromatids or chromosomes are presentin: (h) an oogonial cell prior to S phase, (i) a spermatid, (j) a primary oocyte arrested prior to ovulation,(k) a secondary oocyte arrested prior to fertilization,(l) a second polar body, and (m) a chimpanzee sperm?
II. A diploid species has 3 pairs of chromosomes in the somatic cells. In males, the first pair is large submetacentric; the second is medium acrocentric, and the third is small telocentric. In females, the first two pairs are like those of the males while the third is large metacentric with satellite. Illustrate the karyograms of the following: a. A triploid cell in femalesb. tetrasomic cell in malesc. tetraploid cell in females
4. a. Give at least three examples of types of mutationsthat would disrupt the process of mitotic chromosomesegregation. That is, explain in what DNA structuresor in genes encoding what kinds of proteins youwould find these segregation-disrupting mutations.b. How could you use yeast artificial chromosomes(YACs) to find such mutations in S. cerevisiae?
imagine a giraffe whose diploid is 30. A) what # of chromosomes will be present in a somatic cell at prophase of mitosis? B) what will be the # of chromosomes present in a somatic cell at prophase 2 of meiosis?