how much do you know about sperm?

How many chromosomes does a sperm cell contain?

A. 46

B. 23

C. 100

D. 17

B. 23. Human DNA molecules are packaged into chromosomes, and most human cells have 46. Reproductive cells like sperm and eggs, however, each have half that amount.

How many sperm per second does the typical human male produce?

A. 20

B. 20,000

C. 1,500

D. 1 milion

C. The typical human male produces about 1,500 sperm per second — that’s just over 1 million sperm cells per day.

At what age does and man’s semen quality start to decline?

A. 51

B. 64

C. 29

D. 93

A. Early research shows that a man’s sperm quality starts to decline around age 51.

When was sperm discovered?

A. 1492

B. 12 BCE

C. 1988

D. 1677

D. Dutch scientist Anton van Leeuwenhoek first observed sperm in 1677.

True or False: Smoking marijuana can lower sperm count.

A. True

B. False

C. It’s complicated

C. There are studies that have shown both that marijuana lowers or raises sperm count. At this point, scientists know that testicles and sperm cells contain a neurotransmitter that interacts with cannabinoids in marijuana, they just don’t know how that interaction affects sperm.