Balbiani discovered special type of chromosome from the salivary gland of chironomus larva which are recognized by the presence of ________?

Explanation

Balbiani's giant polytene chromosomes in Chironomus larvae show a characteristic pattern of dark transverse bands and expanded regions or loops called puffs. These structures result from repeated DNA replication without cell division and active transcription at the puffs. Students may choose only bands because they are the most visible feature, but the special chromosomes are recognized by both bands and loops or puffs.