A vasectomy is simply the cutting and tying back of the vasa deferentia. The procedure has a failure rate of around 0.1% to 0.2% for the first year. Assuming he and the partner are otherwise normal and do not use any contraception, there is an 85% probability of pregnancy during the same time. So there is roughly a 0.15% chance of pregnancy occurring (in the first year after vasectomy).
When the man has had a proper vasectomy it is impossible for him to father a child.
There is the same chance of gay man fathering a gay child as there is a straight man fathering a gay child: about 3% to 8% chance.Homosexuality is the way you are born, it cannot be influenced by other homosexual people, as e.g. family or friends.
It would affect his ability to sire a child.
The options for a man who wants to avoid fathering a child are abstinence from vaginal sex, using codoms, withdrawal or coitus interruptus, and vasectomy. Abstinence is the most effective, followed by vasectomy, condoms, and withdrawal. In addition, a couple may use methods under the control of the female.
Technically the female has the baby and males get vasectomies, so you can't have a baby before or after having a vasectomy. However, if what you are asking is "if a man has had a vasectomy can he still father a child?" then the answer is possibly, but extremely unlikely.
You should not be able to get pregnant by a man who has had a vasectomy.
No probability. Neither parent has an "A" for the child to inherit to make an "AB".
By having sex with another man, or multiple men, that have not had a vasectomy.
You can get HIV from a man who had a vasectomy. Vasectomy only eliminates the sperm portion of semen. HIV is still present in the seminal fluid.
It is not risky, it is impossible. Men do not become pregnant. A man of that age is perfectly capable of fathering a child.
Women have their tubes tied which takes a bit more effort then for men to have a vasectomy, either way the end result is that no child results if either the woman or the man has this done to them.
Only if the vasectomy didn't work.