HER2 that is human epidermal growth factor receptor 2 is one such gene that can play a role in the development of breast disease.

You can donate to all A+, B+, AB+, O+ blood types (82 percent of the population). You can receive blood from other O donors (48 percent of the population).

Everyone has an ABO blood type (A, B, AB, or O) and an Rh factor (positive or negative). Just like eye or hair color, our blood type is inherited from our parents. Each biological parent donates one of two ABO genes to their child. The A and B genes are dominant and the O gene is recessive.