False-colour SEM of human chromosomes

False-colour SEM of human chromosomes

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Credit: BIOPHOTO ASSOCIATES/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph (SEM) of normal human chromosomes. Chromosomes are thread- like DNA structures of the cell nucleus that carry genetic information in the form of genes. Each chromosome consists of two strands (chromatids) joined in a region known as the centromere or kinetochore. Chromosomes are capable of constructing exact copies of themselves whilst the cell is in the resting stage between successive divisions. When chromosome division occurs, the centromere splits longitudinally. The nucleus of every human cell contains 46 chromosomes, 23 of maternal and 23 of paternal origin.

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Keywords: anatomy, chromosome, chromosomes, dna, double helix, false-coloured, genetics, human, human body

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