Snapshot of Card Features. Earn 5,000 bonus points after you spend $1,000 on purchases in the first 90 days. Earn 3 points per $1 on JetBlue purchases, 2 points per $1 at restaurants and grocery stores and 1 point per $1 on all other purchases. No blackout dates on JetBlue-operated flights & redeem for any seat, any time on JetBlue-operated flights.
Fraternal Twins vs. Identical Twins. Fraternal twins are âdizygotic,â meaning that they developed from two different eggs fertilized by two different sperm cells, while identical twins are âmonozygoticâ i.e., they developed from a single fertilized egg that split.
The resulting twins have half of the same DNA, the same as any other sibling, and may or may not have similar physical features. Identical twins are monozygotic, meaning they were created when a single egg fertilized by one sperm, then divides into two separate embryos. A subset of identical twins is mirror image twins. They are rare and account for about one fourth of all identical twins totaling about 5 million twins. Possible Causes.