Question

For tongue rolling, how many alternative forms of genes are present?

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

Answer: (B)

2

Normally, every gene has two alternative forms for a character producing different effects. These alternative forms are called as alleles. For example, in the character of tongue rolling (projecting the tongue out of the mouth in the form of a tube), there are two possibilities - either one can roll the tongue or one cannot. Thus, there are two alleles of this gene -one for rolling and one for non-rolling.