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Centromeres

A 3-D movie that journeys into the human cell revealing a chromosome’s centromere.

Courtesy: National Human Genome Research Institute

This resource is part of the Post 16 genetics and genomics collection of resources.

Telomere 3-D

A 3-D movie that journeys into the human cell revealing a chromosome’s telomeres.

Courtesy: National Human Genome Research Institute.

This resource is part of the Post 16 genetics and genomics collection of resources.

Gene 3-D

A 3-D movie that journeys into the human cell revealing a gene.

Courtesy: National Human Genome Research Institute.

This resource is part of the Post 16 genetics and genomics collection of resources.

Coding sequences in DNA

Of the 3 billion letters in the human genome, only 1% directly code for proteins. Of the rest, about 25% make up genes and their regulatory elements. The functions of the remaining letters are still unclear.

Used with permission from the Howard Hughes Medical Institute, Copyright (2003).  All rights...

Base Pair 3-D

A 3-D movie that journeys into the human cell revealing base pairs.

Courtesy: National Human Genome Research Institute.

This resource is part of the Post 16 genetics and genomics collection of resources.

The chemical structure of DNA

This video looks at how the chemical properties of DNA can be harnessed for a variety of biotechnology applications.

Used with permission from the Howard Hughes Medical Institute, Copyright (2003).  All rights reserved. www.BioInteractive.org.

This resource is part of the Post 16 genetics and ...

DNA packaging

This animation describes how DNA is tightly packed in the nucleus of every cell. DNA wraps around special proteins called histones, which form loops of DNA called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin. Chromatin in turn forms larger loops and coils to form...

Watson constructing base pair models

During the process of trying to elucidate the structure of DNA, Jim Watson made some cardboard models to try to understand how DNA nucleotides are paired. It helped him visualize how hydrogen atoms of paired nucleotides interact with each other to form a symmetrical structure that fits the double helix model.

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Chargaff's ratio

This animation looks at research which led to solving the structure of DNA.  In 1950, Erwin Chargaff published a paper stating that in the DNA of any given species, the ratio of adenine to thymine is equal, as is the ratio of cytosine to guanine. This became known as Chargaff's ratio, and it was an important clue...

Paired DNA strands

This animation illustrates the DNA double helix structure. If untwisted, DNA looks like two parallel strands. Each strand has a linear sequence of A, C, G, and T. The precise order of the letters carries the coded instructions. One strand is a complementary image of the other: A always pairs with T, and C always...

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