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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?

Crossing over of DNA between non-sister chromatids Signup and view all the answers

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

First meiotic division Signup and view all the answers

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

$2^n$ possible combinations Signup and view all the answers

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

Metaphase I Signup and view all the answers

What happens to the chromatids during Anaphase I of meiosis?

They move toward opposite poles independently Signup and view all the answers

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

Metaphase II Signup and view all the answers

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

Breakdown of proteins at the centromere Signup and view all the answers

What is the outcome of cytokinesis in meiosis II?

Formation of four haploid daughter cells Signup and view all the answers

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

Due to crossing over during meiosis I Signup and view all the answers