X chromosome, centromere and telomeres

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X chromosome, centromere and telomeres

Computer artwork of a X chromosome. The red regions mark out the telomeres, the ends of the chromosome and the centromere, the central region of the chromosome. Telomeres consist of short repeated sequences of DNA and proteins, and are looped. The loop structure prevents the end of the chromosome being eroded by enzymes present in the cell nucleus and prevents enzymes from joining two chromosomes together. Telomeres play an important role in cellular aging. As cells replicate and age the telomere steadily shrinks. When the telomere reaches a certain length the cell stops dividing and dies. The backgrounds shows the genetic code depicted in letters and curves

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 6322865

© PASIEKA/SCIENCE PHOTO LIBRARY

Centromere Chromatid Chromosome Chromosomes Code Gene Genes Genetic Code Telomeres Deoxyribonucleic Acid Genetics

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