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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

13. Gene Regulation in Eukaryotes

Epigenetics, Chromatin Modifications, and Regulation

Genetics

13. Gene Regulation in Eukaryotes

Epigenetics, Chromatin Modifications, and Regulation

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Multiple Choice

How do epigenetic marks typically compare between monozygotic twins as they age?

They become increasingly different due to environmental influences.

They remain completely identical throughout life.

They are always more similar than their genetic sequences.

They are reset to identical patterns every year.

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Verified step by step guidance

Understand that monozygotic twins start with nearly identical genetic sequences because they originate from the same fertilized egg.

Recognize that epigenetic marks are chemical modifications to DNA or histones that regulate gene expression without changing the DNA sequence itself.

Know that while twins have very similar epigenetic patterns at birth, these marks can change over time due to environmental factors, lifestyle, diet, and other external influences.

Realize that as twins age, their epigenetic profiles tend to diverge, reflecting their individual experiences and environments, even though their DNA sequence remains the same.

Conclude that the typical pattern is that epigenetic marks become increasingly different between monozygotic twins as they age, rather than remaining identical or being reset periodically.