Math Equation Response Question
Some people have earlobes that are attached to the skin of their necks, while others have earlobes that are unattached. In human beings, having unattached earlobes (A) is a dominant characteristic over attached earlobes (a). The Punnett square below shows the genetic distribution of two parents, one with attached earlobes and one with unattached earlobes.
What is the percent chance that their offspring will have unattached earlobes?
$$
The Punnett square below shows the genetic distribution of two parents, one with attached earlobes (aa) and one with unattached earlobes (AA).
A A
a Aa Aa
There are four possible combinations of alleles in the offspring: two with unattached earlobes (Aa) and two with attached earlobes (aa).
Thus, the chances of their offspring having unattached earlobes is 50%.