Cricotopus sylvestris is a small two-winged fly that is often seen in swarms near water or marshy areas. C. sylvestris is a diploid organism (2n = 4). Make a sketch of: 1. Chromosomes before the S phase on the cell cycle 2. Chromosomes during Metaphase (mitosis). 3. Chromosomes during Anaphase I 4. Chromosomes in a gamete (sperm cell or egg)
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- All of the following could be deduced from the table except CRITERIA MITOSIS MEIOSIS 1. No. of nuclear division 2. Synapsis/crossing over 3. Centromere of sister chromatids at anaphase 4 No. of daughter cells 5. No. of chromosomes per daughter cell 6 Function I. The mother cell in mitosis divides only once, while the mother cell in meiosis divides twice. II. Synapses only takes place in meiosis. III. Centromere of sister chromatids at anaphase separate in both mitosis and meiosis. The number of daughter cells in mitosis is 2, while meiosis is 4. V. Mitosis is haploid, meiosis is diploid. A. I, II, and III B. I, III, IV and V C. I, Il and IV D. I. II. II. V IV, • If you were asked to cormplete the table with the correct answer, which of the following table would you chose? А. CHITERIA MITOSIS MEIOSIS 1. No. of nuciear dimaion Synapais/cossing ove 3. Centromere of NIuzer chromatids atanaphase No. of daaghter cells PTESEnt MI-anached separates Present separates Haploid 5. No of…Match the description with the phase of meiosis. Letters may be used more than once. Homologous chromosomes line up at the equator. 1. prophase I The nuclear membrane 2. metaphase I dissolves around a haploid number of chromosomes. 3. anaphase I Disjunction (separation) of homologous chromosomes 4. telophase I occurs. 5. prophase II Centromeres divide and sister chromatids separate. 6. metaphase | Crossing-over begins. 7. anaphase II 8. telophase II Synapsis occurs. > >+ 1. Complete the table below for chromosome and chromatid number for a human cell: Mitosis Prophase Metaphase Anaphase Telophase End of Mitosis Meiosis I Prophase Metaphase Anaphase Telophase End of Meiosis I Meiosis II Prophase Metaphase Anaphase Telophase End of Meiosis II Chromosome Number Chromatid Number
- MITOSIS MEIOSIS 1. Haploid cells are produced 2. Crossing over takes place 3. One division 4. Diploid cells 5. Formation of tetrads 6. Somatic cells 7. For sexual reproduction 8.2 daughter cells 9. Two divisions 10.Separation of homologous chromosomes 11.Daughter cels with chromosomes identical to parent cell 12. For repair of damaged tissue 13 Cross-linkage of genes 14 Sex cells 15 Daughter cells not identica to the parent cell O 0 O 0 O OO0 O o o O 0 0 o 0 O O O O O1) Compare and Contrast Number of chromosomal duplications Number of cell divisions Number of daughter cells produced Number of chromosomes in daughter cells How chromosomes line up during metaphase Genetic relationship of daughter cells to parent cell Functions performed in the human body Mitosis MeiosisAll of the following are distinctions between the process of mitosis and meiosis EXCEPT: Group of answer choices homologous chromosomes in meiotic cells conduct synapsis meiotic cells produce genetically distinctive cells meiotic cells go through two cell divisions meiotic cells have homologous chromosomes where mitotic cells do not 2. A scientist working in an IVF (in vitro fertilization) clinic mistakenly produced a human zygote with 45 chromosomes. What biological process could explain how this happened? Group of answer choices failure of an egg to complete meiosis II failure of the egg nucleus to be fertilized by the sperm a non-disjunction in meiotic anaphase occurring in either an egg or sperm incomplete cytokinesis during spermatogenesis after meiosis I
- Here is a list of events out of order for nondisjunction during meiosis l: A One homologous chromosome pair moves to the same side of the cell B Gametes are produced with the wrong number of chromosomes C Alignment of homologous pairs on the metaphase plate D Pairing and synapsis of homologous chromosomes E Spindle fibers shorten to separate the homologous chromosomes What is the correct order of events? i DCEAB CDAEB CDAEA DCEBAA. 1. Division of the cell nucleus, results in two daughter nuclei, each have the same number of chromosomes as the parent nucleus. 2. One two identical halves of a duplicated chromosome. 3. Fusion of haploid (n) gametes; results in the formation of a diploid (2)n zygote. 4. The breaking and rejoining of homologous (non sister) chromatids during early meiotic prophase I, resulting in an exchange of genetic material. 5. The diploid (2n) cell that results from the union of haploid (n) gametes in sexual reproduction. 6. The condition of having one set of chromosomes per nucleus. 7. The complex of DNA, proteins and some RNA that makes up eukaryotic chromosomes. 8. Structures in the cell nucleus, composed of chromatin and containing the genes. 9. An X-shaped site in a tetrad marking the location where homologous chromatids previously underwent crossing over. 10. A sex cell; in plants and animals, an egg or sperm. 11. Type of reproduction in which two gametes (usually, but not necessarily,…In the koala, a newly created somatic cell (such as a skin cell) contains 16 total chromosomes. When a male koala germ cell undergoes meiosis, which of the following is true? Select all that apply The value of n for the koala is 8 After meiosis I, a cell will have 8 chromosomes per cell The sperm cell of the kOala will contain 16 chromosomes After DNA replication, the koala's cell wil have 32 chromosomes
- A liver cell in a crocodile contains 32 chromosomes. Which of the following correctly shows the haploid cell in a crocodile and the number of chromosomes expected to be found in a haploid cell? A B C D sperm cell, 32 chromosomes brain cell, 16 chromosomes egg cell, 16 chromosomes muscle cell, 32 chromosomesFruit flies have 8 chromosomes. How many chromosomes/chromatids would one find in a cell in: # chromosomes in G1 # chromosomes in a egg cll # chromatids in a cell in meiotic prophase II %# tetrads in meiotic metaphase I # chromatids in a cell in meiotic telophase I # chromatids in a cell in mitotic prophaseA normal diploid cell from a chimpanzee has 48 chromosomes. How many chromosomes will be in a chimpanzee cell just before meiosis begins, after meiosis I, and after meiosis II? After which of these stages will the chromosomes have two chromatids?