If meiosis does not occur properly, an egg or sperm could end up with too many chromosomes, or not enough chromosomes. Upon fertilization, the baby could then receive an extra chromosome (called a trisomy), or have a missing chromosome (called a monosomy).
It is Possible to Save Money on Airline Tickets. There are some time-proven axioms that you can follow to put the odds on your side in helping you save money on airline tickets. If you want to save money on airfare, don't be rigid on the time of day you want to travel.
Save on first class travel with the companion fare. Although the companion fare can only be used to book flights in the economy cabin, there are still ways to use it and save on first class travel. Complimentary elite upgrades are available close to departure, and some fares can be upgraded further in advance.