The main difference between the to is the degree of contagiousness. hope that helps
It’s 50%. you get Bb, Bb, bb, and bb. So that is 50%
The best answer for your question is D
"They are less likely to have money for extra-curricular activities."
Why? Because often times when one or more children live with only one stable source of income money runs a bit tight. So extra actives for the children will be out of the budget assuming the parent isn't in a high paying profession (doctor, lawyer etc)
C. It just needs one parent.
