A) nucleus of man
B) oocyres of frog
C) salivary glands of silk moth
D) salivary glands of Drosophila
Correct Answer: D
Solution :
Balbiani first observed these chromosomes in the salivary glands of midge Chironomus in 1881. That's why these are called salivary gland chromosomes. These polytene chromosomes are considered as somatic giant tubules and fat bodies of some other dipterans also, eg, Drosophila, Chinomomus, Sciaca, Rhyncosciara etc.
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