Answer: It is possible for two O bloody type to have a child of Blood type B which can be caused by mutation.
Mutation is the changes in genetic content or DNA . Although it is normal for two O blood type parents to have O type child but it is technically possible for O blood type parents to have child of A or B blood type which is due to changes in DNA. Changes in DNA can be caused when sunlight hit our bodies, conversion of food to energy , when our body absorb some chemicals and when our cells try to copy another DNA. The differences between the blood types A, B, and O is very small. This makes it possible for a mother of O blood type produce B egg or a father of O blood type produce B sperm which is caused by mutation.
For a parents with blood type O to have a child with B type blood, the parents blood type O would have to look like B type .
Step-by-step explanation:
Mutation is the change in genetic material or DNA. It can lead to change in blood type of humans with different parents blood types. This mutation can be caused by chemicals we breathe in, exposure to sunlight and so on.