Question

In human beings,tongue rolling is an autosomal dominanat trait over non rolling trait.A tongue roller male marries a non roller female.They have four children of which only one daughter is born as a tongue roller and she got married to a non roller male producing three sins and one daughter.None of these offsprings are tongue rollers.Represent pedigree chart of family for the occurance of tongue rolling trait.

Answer 1

Answer:

Tongue rolling is said to be an autosomal trait. An autosomal trait is an attribute that is not dependent on the gender of the carrier. Here, a male who can roll his tongue is married to a female who cannot. They have four children out of which only one daughter can roll her tongue. This daughter is then married to a male who cannot role his tongue. None of their offsprings have this trait of moving their language. This is the pedigree analysis of the family, and it is so because of the parents and the grandparent's autosomal traits.