Drug resistance in bacteria is a beneficial mutation for the bacteria, but how can it be harmful for humans

It can be harmful for humans because you do not want to hold the drug resistant bacteria within you because it can get you sick! If you take a certain medication over and over again, it will kill most of the bacteria that makes you ill, however it also leaves some bacteria that become RESISTANT towards the certain medication, resulting in the bacteria that is resistant reproducing and getting you sick once again.

Since a female is both xx chromosome and the male passes down the x chromosome, than the offspring would be female since a female is xx.

The correct answer is a