There are several ways that parthenogenetic offspring, with a mother but no father, can be produced: (Scenario #1) A diploid primary oocyte can develop into a baby instead of dividing by meiosis. (Scenario #2) The two cells produced at the end of meiosis II (a haploid egg and a polar body) may fuse to produce a diploid cell that develops into a baby. (Scenario #3) The haploid egg produced by meiosis may undergo DNA replication to produce two identical sister chromatids joined at the centromere. The cell begins to divide by mitosis and the sister chromatids move apart to become separate chromosomes. Instead of completing mitosis, the sister chromatids remain, now as homologous chromosomes in a diploid cell that develops into a baby. Answer the following questions (text and/or drawings with explanations are acceptable):

There are several ways that parthenogenetic offspring, with a mother but no father, can be produced: (Scenario #1) A diploid primary oocyte can develop into a baby instead of dividing by meiosis. (Scenario #2) The two cells produced at the end of meiosis II (a haploid egg and a polar body) may fuse to produce a diploid cell that develops into a baby. (Scenario #3) The haploid egg produced by meiosis may undergo DNA replication to produce two identical sister chromatids joined at the centromere. The cell begins to divide by mitosis and the sister chromatids move apart to become separate chromosomes. Instead of completing mitosis, the sister chromatids remain, now as homologous chromosomes in a diploid cell that develops into a baby. Answer the following questions (text and/or drawings with explanations are acceptable):

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter8: How Cells Reproduce

Section: Chapter Questions

Problem 2.1DID

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Identify the stages of meiosis described by the following meiotic events/conditions/terms. Write prophase I, metaphase I, anaphase I, telophase I, prophase II, metaphase II, anaphase II, or telophase II. In case the events are found in both stages, write the stages both. 1. Separation of homologous chromosome 2. Four haploid daughter cells are formed.
Identify the stages of meiosis described by the following meiotic events/conditions/terms. Write prophase I, metaphase I, anaphase I, telophase I, prophase II, metaphase II, anaphase II, or telophase II. In case the events are found in both stages, write the stages both. 1. Formation of chiasma 2. Each chromatid is considered as full-fledged chromosome. 3. Chromosomes begin to pair off. 4. Spindle microtubules start to attach to the centromere. 5. Tetrads are aligned at the middle of the cell. 6. The sister chromatids separate. 7. Produce 2 haploid daughter cells. 8. The chromosomes line up at the middle of the cell. 9. The sister chromatids move together to the opposite poles. 10. The chromatids reach the poles. 11. The chromosomes in each daughter cell are still duplicated.12. Spindle microtubules attach in the centromere of each haploid daughter cell. 13.
PLEASE ANSWER ASAP B. how many dyads would be found in a cell that is Anaphase I of meiosis?
PLEASE ANSWER THE FOLLOWING QUESTIONS: 1. Which of the following describes the difference between meiosis II and mitosis I? A. Chromosomes line up at the equator. B. Homologous chromosome pairs line up in meiosis I and duplicated chromosomes line up in meiosis II. C. Sister chromatids line up in meiosis I and chromosomes line up in meiosis II. D. There are the same number of chromosomes. 2. What is the significance of meiosis with respect to sexual reproduction?
Give typing answer with explanation and conclusion 1.The process of meiosis for female gametes is called tetralogy oogonadosis oocyte oogenesis
. Complete the following statements using as many ofthe following terms as are appropriate: mitosis, meiosis I (first meiotic division), meiosis II (second meioticdivision), and none (not mitosis nor meiosis I normeiosis II).a. The spindle apparatus is present in cells undergoing_____.b. Chromosome replication occurs just prior to _____.c. The cells resulting from _____ in a haploid cellhave a ploidy of n.d. The cells resulting from _____ in a diploid cellhave a ploidy of n.e. Homologous chromosome pairing regularly occursduring _____.f. Nonhomologous chromosome pairing regularlyoccurs during _____.g. Physical recombination leading to the productionof recombinant progeny classes occurs during_____.h. The separation of sister centromeres occurs during_____.i. Nonsister chromatids are found in the same cellduring _____.
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In human spermatogenesis, mitosis of a stem cell gives rise to one cell that remains a stem cell and one cell that becomes a spermatogonium. (a) Draw four rounds of mitosis for a stem cell, and label the daughter cells. (b) For one spermatogonium, draw the cells it would produce from one round of mitosis followed by meiosis. Label the cells, and label mitosis and meiosis. (c) Explain what would happen if stem cells divided like spermatogonia.
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