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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

During meiosis I, the kinetochores of sister chromatids act as:

Regions where DNA replication occurs

Sites for crossing over between homologous chromosomes

A single functional unit, attaching to microtubules from the same pole

Independent units, each attaching to microtubules from opposite poles

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Verified step by step guidance

Understand the role of kinetochores during meiosis I: Kinetochores are protein structures on chromatids where spindle fibers attach during cell division.

Recall that during meiosis I, homologous chromosomes are separated, but sister chromatids remain together.

Recognize that sister chromatids' kinetochores act as a single functional unit, meaning they attach to microtubules from the same spindle pole rather than opposite poles.

Contrast this with mitosis or meiosis II, where sister chromatids' kinetochores act as independent units attaching to microtubules from opposite poles.

Therefore, the correct description for kinetochores during meiosis I is that they function as a single unit attaching to microtubules from the same pole.