Cell Cycle: Stages of Meiosis

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Questions and Answers

How many chromosomes do sheep belonging to the genus Ovis have?

  • 32 chromosomes
  • 54 chromosomes (correct)
  • 46 chromosomes
  • 23 chromosomes

What is the total number of chromosomes in humans?

  • 46 chromosomes (correct)
  • 54 chromosomes
  • 40 chromosomes
  • 26 chromosomes

How do organisms primarily reproduce?

  • Asexual reproduction
  • Sexual reproduction (correct)
  • Binary fission
  • Budding

In sexual reproduction, how many parents are typically involved?

<p>Two parents (B)</p> Signup and view all the answers

What is the main process that allows parents to pass their chromosomes to offspring in sexual reproduction?

<p>Meiosis (A)</p> Signup and view all the answers

Why do parents need to pass their chromosomes to offspring in sexual reproduction?

<p>To ensure diversity and reproduction (C)</p> Signup and view all the answers

What is the major difference between meiosis I and meiosis II?

<p>Meiosis I involves two rounds of cell division, while meiosis II involves only one round. (C)</p> Signup and view all the answers

During which phase of meiosis does the reduction of chromosome number occur?

<p>Anaphase I (C)</p> Signup and view all the answers

What is the role of cytokinesis in meiosis?

<p>To produce gametes with a reduced chromosome number (A)</p> Signup and view all the answers

Which event occurs during prophase I of meiosis?

<p>Crossing over between non-sister chromatids (A)</p> Signup and view all the answers

What is the significance of having two rounds of cell division in meiosis?

<p>To ensure genetic diversity among the resulting daughter cells (A)</p> Signup and view all the answers

Why does a cell entering meiosis I need to duplicate its genetic material during interphase?

<p>To create identical copies of each chromosome for distribution to daughter cells (A)</p> Signup and view all the answers

During metaphase II of meiosis, what aligns in the metaphase plate?

<p>Individual chromosomes (A)</p> Signup and view all the answers

What is the main difference between anaphase I and anaphase II of meiosis?

<p>Homologous chromosomes segregate in anaphase I, sister chromatids segregate in anaphase II. (B)</p> Signup and view all the answers

What happens to the nuclear envelope during telophase II of meiosis?

<p>It reforms (C)</p> Signup and view all the answers

How many daughter cells are produced at the end of meiosis II if one cell underwent meiosis I?

<p>Four daughter cells (A)</p> Signup and view all the answers

What is responsible for separating chromosomes into sister chromatids during anaphase II?

<p>Meiotic spindle (C)</p> Signup and view all the answers

What aligns in the metaphase plate during metaphase I of meiosis?

<p>Tetrads (D)</p> Signup and view all the answers

What process leads to the restoration of the normal chromosome number of a species?

<p>Fertilization (A)</p> Signup and view all the answers

What is the name of the single cell formed through the fusion of a sperm and an egg during sexual reproduction?

<p>Zygote (A)</p> Signup and view all the answers

Why are the sex cells of diploid organisms usually haploid?

<p>To prevent the zygote from having double the amount of chromosomes (A)</p> Signup and view all the answers

Which process reduces the chromosome number from 46 to 23 in sex cells?

<p>Meiosis (D)</p> Signup and view all the answers

What can happen if a zygote has double the amount of chromosomes?

<p>It can prove to be lethal or disastrous for the organism (B)</p> Signup and view all the answers

Which type of cells undergo meiosis, as opposed to somatic cells that go through mitosis?

<p>Sex cells or gametes (C)</p> Signup and view all the answers

What is the ultimate goal of meiosis I and meiosis II?

<p>Reduce the chromosome number (D)</p> Signup and view all the answers

How many rounds of division are involved in meiosis?

<p>Two (B)</p> Signup and view all the answers

What is the main difference between meiosis I and meiosis II?

<p>The reduction of chromosome number (A)</p> Signup and view all the answers

Which unique event in meiosis contributes to enhancing genetic diversity?

<p>Crossing over (A)</p> Signup and view all the answers

When does meiosis II take place in relation to meiosis I?

<p>Immediately after meiosis I (A)</p> Signup and view all the answers

Why is meiosis I referred to as reductional division?

<p>It reduces the number of chromosome sets (A)</p> Signup and view all the answers

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