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

Which of the following events of meiosis I confirms Mendel's second law of independent assortment?

Replication of DNA during interphase

Random orientation of homologous chromosome pairs at the metaphase I plate

Separation of sister chromatids during anaphase I

Crossing over between non-sister chromatids during prophase I

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Verified step by step guidance

Recall Mendel's second law, the law of independent assortment, which states that alleles of different genes assort independently of one another during gamete formation.

Understand that meiosis I is the stage where homologous chromosomes pair up and then separate, which can influence how alleles are distributed into gametes.

Identify the key event in meiosis I that leads to independent assortment: the random orientation of homologous chromosome pairs at the metaphase I plate, where each pair aligns independently of others.

Recognize that this random orientation means the maternal and paternal chromosomes are assorted into daughter cells independently, which is the physical basis for Mendel's second law.

Note that other events like DNA replication, separation of sister chromatids, or crossing over, while important for meiosis, do not directly demonstrate independent assortment as defined by Mendel's second law.