James Watson's Work on DNA — NEET Biology
📚 Practice ConceptJames Dewey Watson was born in Chicago on 6 April 1928. In 1947, he received B.Sc. degree in Zoology. During these years his interest in bird-watching had matured into a serious desire to learn genetics. This became possible when he received a Fellowship for graduate study in Zoology at Indiana University, Bloomington, where he received his Ph.D. degree in 1950 on a study of the effect of hard X-rays on bacteriophage multiplication.
Assertion (A): Chromosomes were named based on their staining properties during microscopic observation. Reason (R): The term chromosome means “colored bodies” because they were visualized by staining techniques.
View solution & NCERT explanation
Correct answer: A — If both assertion and reason are true and the reason is the correct explanation of the assertion.
NCERT confirms chromosomes were named for staining properties (Assertion true). NCERT states “These were called chromosomes (colored bodies, as they were visualised by staining)” (Reason true). The Reason explains WHY they got this name - because staining made them appear as colored structures under microscope.
What does NCERT say about James Dewey Watson was?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.