yes
3 days
No. That is not possible.
sperm and egg from separate species are non-compatable.
There are only two possible combinations of sperm that a male can produce. A single sperm will either be X bearing or Y bearing. If an X sperm splits one egg, the result will be female. If a Y sperm splits the egg, the result will be male.
human sperm cannot get a cow pregnant. The only species humans can get pregnant with their sperm is another human.
As long as he produces the active male gamete cell (sperm) and physically make it possible for the sperm to reach the ovary and fertilize the ova in the female.
Sperm are visible, but only under magnification. By using a microscope that has a power of a few hundred times, it is possible to actually see them individually. Medical associates can count sperm in samples as well as spot "defective" sperm by the use of a modern microscope. Use the link below to check out some images and short video posts that show you how these little guys look.
Of course not. A female human can only get pregnant with a male human's sperm.
There are millions of different combinations when come to making sperm cells.
A fully operational human sperm contains 23 chromosomes.
No, although that is one of the concepts that is so scary about advances in genetic engineering,
Sperm has no effect on how long you can run.