In some insect larvae, polytene chromosomes are produced when
A) a chromosome breaks and rejoins with another section of the same chromosome.
B) a segment of a chromosome is duplicated during an unequal crossing-over event.
C) a cell divides several times before the chromosomes are duplicated.
D) characteristic banding patterns form on the chromosomes.
E) chromosomes are duplicated repeatedly without a corresponding nuclear division.
Correct Answer:
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