John and jane are planning a family, but each has a brother who has sickle-cell disease, so they are concerned that their children may develop sickle-cell disease. neither john nor jane nor their respective parents have the disease. they consult a genetic counselor who tells them that

there is no chance that any of their children will have sickle-cell disease
it's possible that they cannot produce a child with sickle-cell disease, but blood tests on them both will be required to make sure
all of their children will have sickle-cell disease
one of four of their children can be expected to have sickle-cell disease

The answer would be B: It's possible that they cannot produce a child with sickle-cell disease, but blood tests on them both will be required to make sure.

If the sickle cell ran through the parents jeans then that'll be more of a problem, there can always be a possibility that it is in themselves, but since their parents didn't pass it down to them, their almost in the clear.

Hope this helps!

the gravitational force on an object increase as the mass of an object also, im not going to report you, but this question should be under the science category, not health

some stis can be transmitted through a handshake. - false