Genes & Cells

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NUCLEAR DISARRAY  Normally tightly packed bundles of DNA (as in the normal stem cells, left) come undone in cells that age prematurely (right), enlarging their nuclei and promoting aging.

scientist with woolly mammoth tusk

Researchers extracted and analyzed DNA from ancient mammoth remains, like this tusk found by a river on the Taimyr Peninsula in Siberia, and found evidence of isolation and inbreeding just prior to the animal’s extinction.

Mitochondria

HEAVE HO  Mitochondria (blue), energy-producing structures in cells, may get mutations that lead to diseases in people. Researchers have described a new genetic engineering technique that will eliminate mutant mitochondria from eggs and early embryos to prevent mitochondrial diseases from passing from mother to child.

Genes & Cells

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