DNA, genes and chromosomes

A collection of resources covering DNA, genes and chromosomes. This collection is part of the Post 16 genetics and genomics collection.

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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...

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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Human karyotype

Images representing human karyotypes: male, female and Down syndrome.  Curriculum links include chromosomes, DNA, inheritance, sex chromosomes, inherited disorders

Credit: Wessex Reg. Genetics Centre, Wellcome Images

This resource is part of the ...

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.

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