A sub-metacentric chromosome has a satellite. When the cell is in metaphase stage, how many total constrictions will be seen in this chromosome?

Two

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Four

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Five

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Three

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Solution

The correct option is D Three
When a chromosome has satellite, there is the presence of secondary constriction. In metaphase stage, each chromosome has two chromatids, thus having two secondary constrictions and one primary constriction. Hence, three total constrictions will be seen in the chromosome.

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