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

Mitosis

Genetics

9. Mitosis and Meiosis

Mitosis

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Multiple Choice

During mitosis, sister chromatids are held together by which of the following structures?

Cohesin proteins

Spindle fibers

Centrioles

Kinetochore microtubules

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Verified step by step guidance

Understand the role of sister chromatids during mitosis: Sister chromatids are identical copies of a chromosome that are connected and need to be separated accurately during cell division.

Identify the structure responsible for holding sister chromatids together: This structure must maintain the connection between the chromatids until they are ready to be pulled apart during anaphase.

Recall that cohesin proteins form a ring-like complex that physically encircles sister chromatids, keeping them attached after DNA replication and until anaphase.

Differentiate cohesin proteins from other options: spindle fibers are involved in pulling chromatids apart, centrioles organize spindle fibers, and kinetochore microtubules attach to chromatids but do not hold them together.

Conclude that the correct structure holding sister chromatids together during mitosis is the cohesin protein complex.