Chromosome Structure and Replication

Chromosome Structure and Replication - Chromosome Structure...

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Chromosome Structure and Replication A chromatid is a single DNA molecule. Double-stranded chromosomes have two chromatids; normally, each one is identical to the other. The point where the two chromatids are attached is called the centromere . Chromosome Doubling vs DNA Synthesis Splitting chromosomes into two will double their number because each chromatid is identical. DNA replication occurs when a single-stranded chromosome produces a second chromatid. Click here to review DNA synthesis (replication). Overview of the Cell Cycle Interphase (G 1 and G 2 ) Chromosomes are not visible because they are uncoiled Prophase The chromosomes coil. The nuclear membrane disintegrates. The spindle apparatus forms.
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The chromosomes become aligned. Anaphase The chromatids separate (The number of chromosomes doubles). Telophase The nuclear membrane reappears. The chromosomes uncoil. The spindle apparatus breaks down. The cell divides into two.
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Chromosome Structure and Replication - Chromosome Structure...

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