Questions and Answers
What is the difference between meiosis I and meiosis II?
Meiosis I separates homologous chromosomes and meiosis II separates sister chromatids.
The cells at the end of meiosis I are diploid.
False
Which describes the cells at the end of meiosis I?
The cells are haploid. The homologous pairs are in separate cells.
What does the end of meiosis II produce?
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What does the end of nondisjunction during meiosis I produce?
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When nondisjunction occurs in meiosis I, what is the result?
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Which describes the cells at the end of meiosis I when nondisjunction occurs in meiosis II?
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At what phase can nondisjunction occur?
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Study Notes
Meiosis Overview
- Meiosis consists of two stages: meiosis I and meiosis II.
- Meiosis I separates homologous chromosomes; it is crucial for reducing chromosome number.
- Meiosis II separates sister chromatids, leading to the final haploid cells.
Cells at the End of Meiosis I
- Cells resulting from meiosis I are haploid, containing one set of chromosomes.
- Each cell has one of the homologous pairs, now separated into different cells.
Outcome of Meiosis II
- The end result of meiosis II is four haploid cells, which can develop into gametes.
Nondisjunction Events
- Nondisjunction during meiosis I results in two cells with an extra chromosome and two cells missing one chromosome.
- Nondisjunction in meiosis I produces one cell with an extra homologous chromosome and one cell missing a homologous chromosome.
Consequences of Nondisjunction
- When nondisjunction occurs during meiosis II, the cells at the end of meiosis I remain haploid and the homologous pairs are separated into different cells.
Nondisjunction Phases
- Nondisjunction can occur in either anaphase I or anaphase II of meiosis, impacting chromosomal distribution to daughter cells.
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Description
Test your knowledge of human genetics with these flashcards focusing on meiosis. Each card highlights key concepts, such as the differences between meiosis I and II, and the characteristics of the resulting cells. Perfect for students preparing for exams or anyone interested in genetics.
