NEET BIOLOGY

Detailed explanation-1: -The inability to roll the tongue is a recessive trait. If two individuals homozygous recessive for this trait have a child, what is the chance that the child will be able to roll his tongue? No worries!

Detailed explanation-2: -1. In humans, tongue rolling is a dominant trait, those with the recessive condition cannot roll their tongues. Bob can roll his tongue, but his mother could not. He is married to Sally, who cannot roll her tongue.

Detailed explanation-3: -option B is very correct, the ability of man to roll their tongue is characterized under physiological variation, the correct answer is option b.

Detailed explanation-4: -A phenotype is a description of what an organism looks like based on its genotype. A person with the Rr genotype for tongue rolling would be able to roll his or her tongue, because he or she has the dominant allele that allows tongue rolling. So “tongue rolling” is his or her phenotype.

Detailed explanation-5: -In other words, if you inherited one or two copies of the dominant “tongue rolling gene” (R) allele from your parents, then you would be able to roll your tongue. If you inherited two copies of the recessive “tongue rolling gene” (r) allele instead, then you would not be able to roll your tongue.