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

Previous problemNext problem

Struggling with Genetics?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

During meiosis, at which stage can a cell containing sister chromatids be either haploid or diploid?

Before meiosis I

During metaphase of mitosis

After meiosis II

After meiosis I but before meiosis II

Previous problemNext problem

Verified step by step guidance

Understand the ploidy and chromatid number at different stages of meiosis. Initially, a cell is diploid (2n) with duplicated chromosomes, meaning each chromosome consists of two sister chromatids.

During meiosis I, homologous chromosomes separate, reducing the chromosome number by half. After meiosis I, the cell is haploid (n) but each chromosome still consists of two sister chromatids.

Before meiosis I, the cell is diploid with sister chromatids; after meiosis I, the cell is haploid with sister chromatids; after meiosis II, sister chromatids separate, resulting in haploid cells with single chromatids.

Identify the stage where the cell can be either haploid or diploid with sister chromatids: before meiosis I (diploid) and after meiosis I but before meiosis II (haploid).

Conclude that the correct stage described is after meiosis I but before meiosis II, because at this point the cell is haploid but still contains sister chromatids.