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The point, at which polytene chromosomes appears to be attached together, is called

1. centriole
2. centromere
3. chromomere
4. chromocentre

Correct answer: chromocentre

Solution

Polytene chromosomes have many aligned chromatids, and their chromosome arms appear joined at a common dense region called the chromocentre. A centromere is a specific chromosome constriction, while chromomeres are bead-like regions along chromosomes.

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