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

3. Extensions to Mendelian Inheritance

Overview of interacting Genes

Genetics

3. Extensions to Mendelian Inheritance

Overview of interacting Genes

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Multiple Choice

Which of the following is a mechanism by which genes can be imprinted?

Alternative splicing

Transcriptional elongation

Gene duplication

DNA methylation

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Verified step by step guidance

Understand that gene imprinting is an epigenetic phenomenon where certain genes are expressed in a parent-of-origin-specific manner, meaning only one allele of the gene (either maternal or paternal) is active while the other is silenced.

Recognize that the key mechanism behind gene imprinting involves chemical modifications to the DNA or histones that do not change the DNA sequence but affect gene expression.

Identify DNA methylation as a primary epigenetic modification involved in imprinting. DNA methylation typically occurs at cytosine bases in CpG dinucleotides and leads to repression of gene expression.

Contrast DNA methylation with other processes listed: alternative splicing modifies mRNA transcripts, transcriptional elongation affects RNA synthesis speed, and gene duplication increases gene copy number; none of these directly cause imprinting.

Conclude that DNA methylation is the mechanism by which genes can be imprinted because it stably silences one allele, ensuring parent-specific gene expression.