| (a) Polygenic Inheritance |
Multiple allelism |
| (i) controlled by three or more genes |
More then two alleles govern the same character |
| (ii) Example A-B-C gene control human skin colour |
ABO blood grouping in humans |
(b) - It should be able to generate its replica / replication
- It should be chemically and structurally stable
- It should provide the scope for slow changes / mutation that are required for evolution
- It should be able to express itself in the form of a Mendelian characters.
