visible chromosomes

Why Do Chromosomes Become Visible?

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Why Do Chromosomes Become Visible? During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. The chromatin coils and becomes increasingly compact, resulting in the formation of visible chromosomes. Why are chromosomes visible during mitosis? Each chromosome is made up of DNA tightly coiled many times around proteins called

What Causes A Dark Band On The Chromosomes?

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What Causes A Dark Band On The Chromosomes? A karyotype analysis usually involves blocking cells in mitosis and staining the condensed chromosomes with Giemsa dye. The dye stains regions of chromosomes that are rich in the base pairs Adenine (A) and Thymine (T) producing a dark band. What do dark bands in the chromosome indicate?