Describe three major goals of the Human Genome Project.
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
- 19. Cancer Genetics29m
- 20. Quantitative Genetics1h 26m
- 21. Population Genetics50m
- 22. Evolutionary Genetics29m
15. Genomes and Genomics
Genomics and Human Medicine
Problem 12
Textbook Question
The Human Genome Project has demonstrated that in humans of all races and nationalities approximately 99.9 percent of the genome sequence is the same, yet different individuals can be identified by DNA fingerprinting techniques. What is one primary variation in the human genome that can be used to distinguish different individuals? Briefly explain your answer.

1
Step 1: Understand that the Human Genome Project revealed that 99.9% of the human genome is identical across individuals, meaning the remaining 0.1% contains variations that distinguish individuals.
Step 2: Recognize that one primary variation in the human genome used for distinguishing individuals is Single Nucleotide Polymorphisms (SNPs). SNPs are single base-pair changes in the DNA sequence that occur at specific positions in the genome.
Step 3: Learn that SNPs are highly abundant in the genome and can be used as genetic markers because they are inherited and vary between individuals.
Step 4: Understand that another variation used for DNA fingerprinting is Short Tandem Repeats (STRs). STRs are repeating sequences of 2-6 base pairs in specific regions of the genome, and the number of repeats can vary greatly between individuals.
Step 5: Recognize that techniques like PCR (Polymerase Chain Reaction) and gel electrophoresis are used to analyze these variations (SNPs and STRs) for DNA fingerprinting, enabling identification of individuals based on their unique genetic profiles.

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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Single Nucleotide Polymorphisms (SNPs)
Single Nucleotide Polymorphisms, or SNPs, are the most common type of genetic variation among people. They occur when a single nucleotide in the genome is altered, which can lead to differences in traits and susceptibility to diseases. SNPs are crucial for DNA fingerprinting as they can be used to identify individuals based on unique patterns in their genetic code.
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Short Tandem Repeats (STRs)
Short Tandem Repeats (STRs) are repeating sequences of 2-6 base pairs of DNA found in specific locations in the genome. The number of repeats can vary significantly among individuals, making STRs valuable for forensic analysis and paternity testing. By comparing the number of repeats at various STR loci, scientists can create a unique DNA profile for an individual.
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DNA Fingerprinting
DNA fingerprinting is a technique used to identify individuals based on their unique DNA characteristics. It involves analyzing specific regions of the genome, such as SNPs and STRs, to create a genetic profile. This method is widely used in forensic science, paternity testing, and genetic research, allowing for the distinction of individuals despite the high genetic similarity among humans.
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