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- Match the phase of cell division with the following diagrams. In these cells, 2n = 4. a. anaphase of meiosis I b. interphase of mitosis c. metaphase of mitosis d. metaphase of meiosis I e. metaphase of meiosis IIHuman cells normally have 46 chromosomes. For eachof the following stages, state the number of nuclear DNAmolecules present in a human cell:a. Metaphase of mitosisb. Metaphase I of meiosisc. Telophase of mitosisd. Telophase I of meiosise. Telophase II of meiosisAssuming that such a fly would be viable, what would be the sexof a fruit fly with the following chromosomal composition?A. One X chromosome and two sets of autosomesB. Two X chromosomes, one Y chromosome, and two sets ofautosomesC. Two X chromosomes and four sets of autosomesD. Four X chromosomes, two Y chromosomes, and four sets ofautosomes
- Use the following information as the basis for answering the question: A diploid eukaryotic organism has 4 unique chromosomes. Chromosome I is metacentric, chromosome II is telocentric, chromosome III is submetacentric, and chromosome IV is acrocentric. Draw a detailed picture of a germ cell from this organism in Metaphase of Mitosis and label all chromosomal and cellular components. Be sure to label each chromosome (I, II, III, or IV) and include the following in your drawing: centrosomes, 3 kinds of microtubules, metaphase/equatorial plate, and plasma membrane. Use the letter p to indicate a paternal chromosome and m to indicate a maternal chromosome.if a species of animal has 18 chromosomes in its diploid cells (2n=18). Describe what the metaphase chromosome arrangement would look like for this species in each of the following stages: mitosis, meiosis I, and meiosis IlThe cat has a diploid number 2n=38, describe the alignment of chromosomes on the metaphase plate during each phase below and indicate the number of chromosome structures aligned for each phase (single or synapsed structures). In other words, determine the number of structures present at the equatorial plate during metaphase and explain each configuration (the chromosome and chromatid arrangements) composition of each chromatid and if crossing over occurs. a. Mitosis b. Meiosis I c. Meiosis II
- Which of the following statements accurately describes a differencebetween mitosis and meiosis?a. Mitosis may produce diploid cells, whereas meiosis produceshaploid cells.b. Homologous chromosomes synapse during meiosis but do notsynapse during mitosis.c. Crossing over commonly occurs during meiosis, but it does notcommonly occur during mitosis.d. All of the above are correct.e. Both a and c are correctThe repeat expansion appears to occur during meiosis but not mitosis. Why mightthis be true?Use the following information as the basis for answering the question: A diploid eukaryotic organism has 4 unique chromosomes. Chromosome I is metacentric, chromosome II is telocentric, chromosome III is a submetacentric, and chromosome IV is acrocentric. Draw a detailed picture of BOTH of the daughter cells produced from Meiosis I of a germ cell from this organism in Metaphase of Meiosis II and label all chromosomal and cellular components. Be sure to label each chromosome (I, II, III, or IV) and include the following in your drawing: centrosomes, 3 kinds of microtubules, metaphase/equatorial plate, and plasma membrane. Use the letter p to indicate a paternal chromosome and m to indicate a maternal chromosome.
- A sexually reproducing organism has the following phenotype DdEeAaTt: The D and E loci are on the same arm of a metacentric chromosome in cis configuration. The A locus is on the long arm of an acrocentric chromosome and the T locus is on a telocentric chromosome. There are no other chromosomes. Using diagrams, show a cell at metaphase of mitosis and show the results of mitosis. Ensure you show the location of the gene loci on the different chromosomes.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?Which of the following is one of the very importantdifferences between mitosis and meiosis?a. Chromosomes align midway between spindle polesonly in meiosis.b. Homologous chromosomes separate only inmeiosis.c. DNA is replicated before mitosis only.d. Sister chromatids separate only in meiosis.e. Interphase occurs only in mitosis.