On which plant did Hugo de Vries work?

Normally $DNA$ molecule has $A-T$ and $G-C$ pairing. However,these bases can exist in alternative valency status,owing to rearrangements called:

The sixth mutant codon of the beta globin gene causing polymerization of haemoglobin and change in $RBC$ shape is . . . . . . .

What is the mechanism of moving a segment from one linkage group to another called?

Point mutation arises due to change in

Non-ionizing radiations are generally known to cause mutations in organisms. These are: