Two scientists walk into a bar. The first one says, "I'll have some H2O." The second says, "I'll have some H2O too." The second scientist dies.
What is the fastest way to determine the sex of a chromosome?
Pull down its genes.
Did you hear about the man who was cooled to absolute zero?
He's 0K now.
What did the male magnet say to the female magnet?
From your backside, I thought you were repulsive. However, after seeing you from the front, I find you rather attractive.
There's a band called 1023MB. They haven't had any gigs yet.
Did you hear about the biologist who had twins?
She baptized one and kept the other as a control.