Table of contents

1. Introduction to Genetics51m
2. Mendel's Laws of Inheritance3h 37m
3. Extensions to Mendelian Inheritance2h 41m
4. Genetic Mapping and Linkage2h 28m
5. Genetics of Bacteria and Viruses1h 21m
6. Chromosomal Variation1h 48m
7. DNA and Chromosome Structure56m
8. DNA Replication1h 10m
9. Mitosis and Meiosis1h 34m
10. Transcription1h 0m
11. Translation58m
12. Gene Regulation in Prokaryotes1h 19m
13. Gene Regulation in Eukaryotes44m
14. Genetic Control of Development44m
15. Genomes and Genomics1h 50m
16. Transposable Elements47m
17. Mutation, Repair, and Recombination1h 6m
18. Molecular Genetic Tools19m
- Genetic Cloning
  9m
- Methods for Analyzing DNA
  9m
19. Cancer Genetics29m
- Overview of Cancer
  21m
- Cancer Mutations
  7m
20. Quantitative Genetics1h 26m
21. Population Genetics50m
- Hardy Weinberg
  19m
- Allelic Frequency Changes
  31m
22. Evolutionary Genetics29m

9. Mitosis and Meiosis

Meiosis

Genetics

9. Mitosis and Meiosis

Meiosis

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Multiple Choice

All of the following events occur during meiosis I EXCEPT:

Crossing over between homologous chromosomes

Formation of tetrads

Homologous chromosomes separate

Sister chromatids separate

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Verified step by step guidance

Step 1: Understand the stages of meiosis I and meiosis II. Meiosis I is the reductional division where homologous chromosomes separate, while meiosis II is the equational division where sister chromatids separate.

Step 2: Identify key events that occur during meiosis I: crossing over between homologous chromosomes (prophase I), formation of tetrads (pairing of homologous chromosomes in prophase I), and separation of homologous chromosomes (anaphase I).

Step 3: Recognize that sister chromatids remain attached during meiosis I and only separate during meiosis II, specifically in anaphase II.

Step 4: Compare the given options to these events and determine which event does NOT occur during meiosis I based on the definitions and timing of chromosome behavior.

Step 5: Conclude that 'Sister chromatids separate' is the event that does not occur during meiosis I, as it happens in meiosis II.