139k views
3 votes
if the right handedness allele is dominant over the left handedness allele and a mother is heterozygous for right handedness and the father is left handed, what percent of their children will be left handed?

1 Answer

5 votes

Final answer:

About 50% of the children from a heterozygous right-handed mother and a homozygous left-handed father will be left handed, following Mendelian inheritance patterns.

Step-by-step explanation:

Approximately 50% of the children will be left handed. This is because the mother is heterozygous and the father is homozygous for the recessive left handedness allele. In terms of genetics, handedness is a trait with a dominant allele for right-handedness (R) and a recessive allele for left-handedness (r).When we do a simple Punnett square to determine the possible genetic combinations of their offspring, we get the following genotype possibilities: Rr (right-handed, heterozygous) and rr (left-handed). T

here is a 50% chance for each child to inherit R from the mother and r from the father, resulting in right-handedness. Conversely, there is also a 50% chance for each child to inherit r from both — this would result in left-handedness. Hence, the probability that a child will be left-handed is 50%. This example follows the principles of Mendelian inheritance, wherein the segregation of alleles determines the offspring's traits.

User Taddeo
by
8.6k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.