In the construction of chromosome maps, the evidence is derived mainly from
Cross over values
Hereditary effects of chromosome fragmentation
Electron microscopy
Behaviour of chromosomes during meiosis
Assertion : The uptake of $DNA$ during transformation is an active, energy requiring process.
Reason : Transformation occurs in only those bacteria, which possess the enzymatic machinery involved in the active uptake and recombination
A normal metaphase chromosome with a midial centromere is
One gene one enzyme'' theory was proposed by
Khorana got the Nobel Prize on