Why do the egg and sperm contain only half the genetic information?

An egg or sperm only has half of the parent's s!x chromosome pair. An egg will always have an X chromosome, since the woman's s!x chromosome pair only has Xs. Sperm can have either an X chromosome or a Y chromosome. If a sperm with an X chromosome fertilizes the egg, the new cell will have two X chromosomes.

a graduated cylinder.

explanation:

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.