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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 which stages of meiosis are sister chromatids present within a cell?

Only after telophase II

Only before meiosis I begins

Both meiosis I and meiosis II, until anaphase II

Never; sister chromatids are separated before meiosis starts

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Verified step by step guidance

Recall that sister chromatids are identical copies of a chromosome connected by a centromere, formed during DNA replication in the S phase of the cell cycle, before meiosis begins.

Understand that meiosis consists of two divisions: meiosis I and meiosis II. During meiosis I, homologous chromosomes separate, but sister chromatids remain attached.

Recognize that sister chromatids remain together through prophase I, metaphase I, and anaphase I, and only separate during anaphase II of meiosis II.

Note that after telophase II, the sister chromatids have separated into individual chromosomes in different cells, so sister chromatids are no longer present together.

Conclude that sister chromatids are present from the start of meiosis I until anaphase II, when they finally separate.