12 Questions
What is responsible for most of the genetic variation in each generation?
Independent assortment of chromosomes during meiosis
What is the probability that a given daughter cell of meiosis I will obtain a certain homologous pair's maternal or paternal chromosome?
50%
How many possible combinations are there when chromosomes sort independently during meiosis?
$2^n$
What occurs during early prophase I of meiosis?
Crossing over of DNA between non-sister chromatids
Which phase results in each pair sorting its maternal and paternal homologs independently into daughter cells?
First meiotic division
What generates genetic variation due to the random orientation of pairs of homologous chromosomes at metaphase I?
$2^n$ possible combinations
During which phase of meiosis do homologous chromosomes line up independently of each other?
Metaphase I
What happens to the chromatids during Anaphase I of meiosis?
They move toward opposite poles independently
Which phase of meiosis is most similar to the metaphase of mitosis?
Metaphase II
What causes sister chromatids to separate during Anaphase II of meiosis?
Breakdown of proteins at the centromere
What is the outcome of cytokinesis in meiosis II?
Formation of four haploid daughter cells
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
Test your knowledge on the stages and events of meiosis, including chiasmata formation, kinetochore attachment, metaphase I alignment, and independent assortment.
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