Meiosis Stages and Events

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Questions and Answers

What is responsible for most of the genetic variation in each generation?

  • Random orientation of chromosomal pairs at metaphase I
  • Crossing over of DNA during interphase
  • Fertilization process
  • Independent assortment of chromosomes during meiosis (correct)

What is the probability that a given daughter cell of meiosis I will obtain a certain homologous pair's maternal or paternal chromosome?

  • 75%
  • 100%
  • 25%
  • 50% (correct)

How many possible combinations are there when chromosomes sort independently during meiosis?

  • $n+2$
  • $2^n$ (correct)
  • $n^2$
  • $3n$

What occurs during early prophase I of meiosis?

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

Which phase results in each pair sorting its maternal and paternal homologs independently into daughter cells?

<p>First meiotic division (D)</p> Signup and view all the answers

What generates genetic variation due to the random orientation of pairs of homologous chromosomes at metaphase I?

<p>$2^n$ possible combinations (B)</p> Signup and view all the answers

During which phase of meiosis do homologous chromosomes line up independently of each other?

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

What happens to the chromatids during Anaphase I of meiosis?

<p>They move toward opposite poles independently (D)</p> Signup and view all the answers

Which phase of meiosis is most similar to the metaphase of mitosis?

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

What causes sister chromatids to separate during Anaphase II of meiosis?

<p>Breakdown of proteins at the centromere (D)</p> Signup and view all the answers

What is the outcome of cytokinesis in meiosis II?

<p>Formation of four haploid daughter cells (C)</p> Signup and view all the answers

Why are the daughter cells produced after meiosis genetically distinct from each other and from the parent cell?

<p>Due to crossing over during meiosis I (B)</p> Signup and view all the answers

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