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

Sister chromatids differ from nonsister chromatids in that sister chromatids:

contain different alleles for the same genes

separate during fertilization

are identical copies of a single chromosome joined at the centromere

are homologous chromosomes inherited from different parents

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Verified step by step guidance

Understand the definition of sister chromatids: Sister chromatids are two identical copies of a single chromosome that are connected at a region called the centromere. They are formed during DNA replication in the S phase of the cell cycle.

Recognize that sister chromatids carry the same alleles for each gene because they are exact copies of one chromosome, whereas nonsister chromatids come from homologous chromosomes and may carry different alleles.

Recall that nonsister chromatids refer to chromatids of homologous chromosomes, which are inherited from different parents and are not identical, unlike sister chromatids.

Note that sister chromatids separate during mitosis or meiosis II, not during fertilization, which involves the fusion of gametes.

Conclude that the key distinguishing feature of sister chromatids is that they are identical copies of a single chromosome joined at the centromere.