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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 synapsis of meiosis I, which of the following line up side by side?

Non-homologous chromosomes

Centromeres

Sister chromatids

Homologous chromosomes

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Verified step by step guidance

Understand the process of synapsis during meiosis I: Synapsis is the pairing of homologous chromosomes that occurs during prophase I of meiosis.

Recall that homologous chromosomes are pairs of chromosomes, one inherited from each parent, that have the same genes at the same loci but may have different alleles.

During synapsis, homologous chromosomes align side by side along their lengths to form a structure called a tetrad or bivalent.

Note that sister chromatids are identical copies of a single chromosome connected at the centromere, and they do not line up side by side with non-homologous chromosomes during synapsis.

Therefore, the chromosomes that line up side by side during synapsis are the homologous chromosomes, enabling crossing over and genetic recombination.