If Brie were to (one day) marry a man who was heterozygous for the tongue-rolling trait, whatpercentage of their children would be able to roll their tongues?а. 0%b. 25%c. 50%d. 75%е. 100%QUESTION 69Please read the scenario below; then, answer the question (in bold) that follows.In humans, the ability to roll one's tongue is a dominant trait (R). A woman who can roll her tongue ismarried to a man who cannot roll his tongue. The couple's daughter, Brie, can roll her tongue, buttheir son, Michael, cannot.Imagine, for a moment, that the mother and father separate, and the mother decides toremarry. If her second husband is homozygous dominant for the tongue-rolling gene, what isthe likelihood that their children (if they choose to have any) will be able to roll their tongues?а. 0%b. 25%c. 50%d. 75%е. 100%

Name: If Brie were to (one day) marry a man who was heterozygous for the to
Uploaded: 2024-03-20T06:43:04.000Z
Channel: Bartleby
Description: If Brie were to (one day) marry a man who was heterozygous for the tongue-rolling trait, whatpercentage of their children would be able to roll their tongues?а. 0%b. 25%c. 50%d. 75%е. 100%QUESTION 69Please read the scenario below; then, answer the q

Tongue Tongue rolling trait is a discontinuous trait, it means a person is either roll his tongue or not. It is a dominant character. Ans. 69 Correct option is "E" 100% Tongue rolling trait is a autosomal dominant trait. Individual havig homozygous dominant and heterozygous conditions are able to roll tongue and individual having homozygous recessive conditions can not roll his/her tongue. In given conditions Mother can roll her tongue and father does not. There 50% children are able to roll there tongue and 50% does not. So the genotype of mother will be Rr Now, in second marriage Mother genotypes = R r Father genotype = R R On crossing we get R R × R r RR RR RR Rr 100% of children have dominant gene for rolling tongue Solution for Brie Brie is able to roll her tongue Genotype of Brie = R r Genotype of her husband = R r On crossing we get R r × R r RR Rr Rr rr 75% of her children are able to roll there tongue. So, The correct option is 75% (D)