Question

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?

Answer 1

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.