Explore traits, the characteristics that make us unique.
Get to know the molecule that holds the instructions for building every living thing.
Learn how traits pass from parents to offspring.
Take a look at how variation occurs.
We are pleased to offer you a partial preview of our new Tour of Basic Genetics.
More chapters will be available soon. But we wanted to make the new chapters available as soon as possible, especially for those who are using mobile devices or the most-recent version of web browsers that no longer support Adobe Flash content.
Our flash-based old tour is still available.
read a set of chromosomes, scientists look for key features to identify their similarities and differences.
Try your hand at organizing a profile of human chromosomes.
Certain genetic disorders can be diagnosed by looking at a person's chromosomes.
Protective tips at the end of our chromosomes get shorter as we age.
The terms dominant and recessive describe the inheritance patterns of certain traits. But what do they really mean?
Compare the two ways for organisms to pass genetic information to their offspring.
DNA analysis can help build the family tree. Find out about autosomal, x chromosome, y chromosome, and mitochondrial DNA.
Explore the types of proteins and learn about their varied functions.
See how cells "read" the information in a DNA sequence to build a protein, then build one yourself!
Walk through protein synthesis with this animated example.
Mad Cow and Creutzfeldt-Jakob are examples of prion diseases. What makes them unusual, and why are they controversial?
Take a look at several inherited human characteristics and learn more about them. Which variations do you have?
Do these fun activities about inherited traits and disease risk with your family or at public gatherings.
Find out how the DNA code letters A, C, G, and T make a DNA molecule by building one yourself.
Introns, exons, and regulatory sequences: Examine the parts of a gene from "start" to "stop."
Put an end to these common misconceptions about DNA and Heredity.
See how cells interpret DNA sentences.
An accidental discovery leads to important clues about human evolution.
Take a look at the inheritance of the ABO blood typing system and the genes behind it.
Learn about the genetic underpinnings of biological clocks.
DNA Day is April 25th. Check out the NHGRI DNA Day website.
RNA's chemical structure gives it the flexibility to take on a variety of shapes and functions.
Learn the essential roles of the three most plentiful types of RNA messenger, transfer, and ribosomal in the processes of transcription and translation.
Learn about some of the less-known roles of RNA.
Small changes to DNA can lead to big variations in traits.
Bizarre mutations in fruit flies led to the discovery of genes that guide development.
See how a mutated protein can affect normal cell division.
Genetic variations can provide clues about common ancestry.