A) cistron
B) transposon
C) intron
D) recon
Correct Answer: B
Solution :
Transposon is a DNA segment or genetic element moving from one chromosome to another. The 'term', was introduced by RW Hedges and A E Jacob in 1974, to 'controlling elements' or 'Jumping genes', discovered by Barbara McClintock (1983) in maize. Cistron is the functional unit of DAN molecule, it codes for a particular gene product. Recon is the cross-over unit or it is segment of DNA, which participates in crossing over. Introns are the interrupted genes or those regions of a gene, which are non-coding sequences, and get removed during splicing and processing.
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