The diagrammatic representation of the chromosomes of an individual is called

The loss of chromosomal segment is due to

Incomplete linkage is ...$A$.... Complete linkage is ...$B$.... Choose correct option for $A$ and $B$

Sometimes the separation of twins is incomplete and these are borne attached are remain so even after. Such twins are known as

Number of autosomal chromosomes in Drosophila

In a mutational event, when adenine is replaced by guanine, it is the case of