NEET BIOLOGY

Detailed explanation-1: -A researcher found out that some related individuals can roll the lateral edges of their tongues while other related individuals are unable to do so. What could be said about the ability to roll tongues? It is an inherited trait.

Detailed explanation-2: -Based on the genetic cross the genotype of the offspring will be rr which is homozygous recessive. This is why, the child will not be able to roll their tongue as they do not have the dominant allele. Therefore, there is 0% chance of children having the tongue rolling character.

Detailed explanation-3: -In humans, the ability to roll the tongue is a dominant trait. The inability to roll the tongue is a recessive trait.

Detailed explanation-4: -Tongue rolling is the ability to roll the lateral edges of the tongue upwards into a tube. The tongue’s intrinsic muscles allow some people to form their tongues into specific shapes.

Detailed explanation-5: -Based on the genetic inheritance, let us assume the dominant trait as “R” and the recessive trait as “r.” If a person is born with the “rr” type of gene, he will not have the ability to tongue twist. If he is born with the “Rr” gene, he will be capable of twisting his tongue.