A) a segment of DNA, capable of crossing over
B) functional unit of DNA
C) a segment of RNA
D) a segment of chromosome
Correct Answer: B
Solution :
Johansseen (1909) proposed the term gene. Genes are made up of DNA i.e. a DNA segment associated with proteins which can be copied in the form of RNA and are responsible for hereditary characters. Genes have full control over protein synthesis.
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