Answer:
actually doctors are not always heroes because they may save people but they also kill people like if your making a medicine and give it to people and someone could get sick from it. also you shouldn't make something give it to someone that has never been made before cause it could be deadly
Explanation:
The concept of heredity is that genes are not randomly passed down. Well, technically they are but we use punett squares to predict the chances of passing certain traits. Because virtually all traits that are dominant are more common than recessive ones, and because all genes are not passed in a completely random way, it is not just pure chance, but calculated chance by which we can predict the probability of what genes are passed down. Hope this helps!