Q. More than two alternate forms of a gene present on the same locus are called ___. They are produced due to repeated ___ of the same gene but in different directions. Their well known example is ___ Which of the following correctly fills the above statement?
(i) (ii) (iii)
1 Epistatic genes crossing over polydactyly
2 Multiple alleles mutations human blood groups
3 Supplementary genes mutations hypertrichosis
4 Linked genes crossing over alkaptonuria

 1989  195 Principles of Inheritance and Variation Report Error

Solution:

Correct answer is (b) 2