A would have it.
A is hetrozygous person. Since it is dominant, you only need 1 "H" to recieve the gene. Since B has two "h", it would not contain the disease.
When determining when something will die, there are many factors that will determine the end result of your prediction. However, there are multiple things that could block you from a correct or near correct prediction. Bias is one of them. Bias is preferring something over another. If you liked Apple, and hated Samsung, when listing cone, Samsung might have more, even though their hardware is actually better, you had a bias for Apple. Hoped this helped!
Genetic factors contributes to the formation of the dead zones is by their ability to expand their abilities that enables them to spread and contribute to the formation of the dead zones. These dead zones are made when the oxygen are low where it is necessarily important for the aquatic life, if the oxygen needed is depleted or too low, instead of supporting aquatic life, dead zones are created and factors contribute to these occurrences with their ability to expand.