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

15. Genomes and Genomics

Bioinformatics

Genetics

15. Genomes and Genomics

Bioinformatics

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Multiple Choice

Which of the following can be used to identify an open-reading frame?

cDNA sequences

Introns

Enhancer locations

Exons

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Verified step by step guidance

Understand the concept of an open-reading frame (ORF): An ORF is a sequence of DNA that has the potential to be translated into a protein. It starts with a start codon (usually AUG) and ends with a stop codon (UAA, UAG, or UGA).

Recognize the role of cDNA sequences: cDNA is complementary DNA synthesized from an mRNA template. Since mRNA is processed and does not contain introns, cDNA represents the coding sequence of a gene, which includes the ORF.

Consider the role of introns: Introns are non-coding regions within a gene that are removed during RNA splicing. They do not help in identifying ORFs as they are not part of the mature mRNA.

Evaluate enhancer locations: Enhancers are regulatory DNA sequences that increase the transcription of associated genes. They do not directly indicate ORFs as they are not part of the coding sequence.

Assess the function of exons: Exons are coding regions of a gene that remain in the mRNA after splicing. They are part of the ORF, but alone, they do not identify the complete ORF without the context of the entire mRNA or cDNA sequence.

8:28m

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Open Question

DNA footprint protection (described in Research Technique 8.1) is a method that determines whether proteins bind to a specific sample of DNA and thus protect part of the DNA from random enzymatic cleavage by DNase I. A 400-bp segment of cloned DNA is thought to contain a promoter. The cloned DNA is analyzed by DNA footprinting to help determine if it has the capacity to act as a promoter sequence. The accompanying gel has two lanes, each containing the cloned 400-bp DNA fragment treated with DNase I to randomly cleave unprotected DNA. Lane 1 is cloned DNA that was mixed with RNA polymerase II and several TFII transcription factors before exposure to DNase I. Lane 2 contains cloned DNA that was exposed only to DNase I. RNA pol II and TFIIs were not mixed with that DNA before adding DNase I.Approximately what length is the DNA region protected by RNA pol II and TFIIs?

Open Question

DNA footprint protection (described in Research Technique 8.1) is a method that determines whether proteins bind to a specific sample of DNA and thus protect part of the DNA from random enzymatic cleavage by DNase I. A 400-bp segment of cloned DNA is thought to contain a promoter. The cloned DNA is analyzed by DNA footprinting to help determine if it has the capacity to act as a promoter sequence. The accompanying gel has two lanes, each containing the cloned 400-bp DNA fragment treated with DNase I to randomly cleave unprotected DNA. Lane 1 is cloned DNA that was mixed with RNA polymerase II and several TFII transcription factors before exposure to DNase I. Lane 2 contains cloned DNA that was exposed only to DNase I. RNA pol II and TFIIs were not mixed with that DNA before adding DNase I.What additional genetic experiments would you suggest to verify that this region of cloned DNA contains a functional promoter?

Open Question

DNA footprint protection (described in Research Technique 8.1) is a method that determines whether proteins bind to a specific sample of DNA and thus protect part of the DNA from random enzymatic cleavage by DNase I. A 400-bp segment of cloned DNA is thought to contain a promoter. The cloned DNA is analyzed by DNA footprinting to help determine if it has the capacity to act as a promoter sequence. The accompanying gel has two lanes, each containing the cloned 400-bp DNA fragment treated with DNase I to randomly cleave unprotected DNA. Lane 1 is cloned DNA that was mixed with RNA polymerase II and several TFII transcription factors before exposure to DNase I. Lane 2 contains cloned DNA that was exposed only to DNase I. RNA pol II and TFIIs were not mixed with that DNA before adding DNase I.Explain why this gel provides evidence that the cloned DNA may act as a promoter sequence.

Multiple Choice

Which of the following is NOT a piece of information that bioinformatics can analyze?

Open Question

Go to the National Institute for Child Health and Human Development (http://www.nichd.nih.gov), locate the search box at the top right corner of the homepage, and enter 'RUSP' to search for information on the Recommended Uniform Screening Panel. From the options that appear, select 'Brief History of Newborn Screening' and locate the discussion listing the criteria for adding a disease to the RUSP list. What are the criteria for listing a disease on the RUSP list?

Open Question

What are community-based genetic screening programs? What is the intent of such screening programs? Why are members of specific communities or populations offered the chance to participate in such programs?

Open Question

What is bioinformatics, and why is this discipline essential for studying genomes? Provide two examples of bioinformatics applications.

Open Question

You are designing algorithms for the bioinformatic prediction of gene sequences. How might algorithms differ for predicting genes in bacterial versus eukaryotic genomic sequence?

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