Coloured SEM of a human chromosomes

Coloured SEM of a human chromosomes

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Credit: EYE OF SCIENCE/SCIENCE PHOTO LIBRARY

Caption: Human chromosomes. Coloured Scanning Electron Micrograph (SEM) of several human chromosomes. These thread-like structures occur in the nucleus of every cell, and appear in this shape during cell division at metaphase. Chromosomes carry a person's genetic information in the form of genes. Each chromosome consists of two strands (chromat- ids) joined in a region known as the centromere or kinetochore. Chromosomes make exact copies of themselves while the cell is resting between cell divisions. When a chromosome divides, the centromere splits longitudinally. Apart from the sex cells, all human cells contain 46 chromosomes. Magnification: x2,250 at 6x7cm size.

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Keywords: anatomy, centromere, chromosome, chromosomes, dna, double helix, genetics, human, human body, human chromosome, kinetochore, metaphase chromosome

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