The pairing of homologous chromosomes during prophase 1 lets the crossing over to occur and crossing over between non-sister chromatids, in turn, lets the recombination to occur. Crossing over occurs at points called chiasma, which are created between non-sister chromatids. Chiasma lets the exchange of DNA segments between non-sister chromatids. This exchange of DNA segments produces new combinations of alleles among the offspring, which is identified as genetic recombination.
Complimentary Guest Upgrades are paper upgrade coupons given to MVP Gold members to upgrade friends or family members who are not traveling with them, or for their own use for immediate upgrade when not purchasing a qualifying fare.
You can transfer Starwood Preferred Guest points to about 30 different airline partners at a 1:1 ratio with Alaska Airlines being one of them. For every 20,000 miles you transfer, you receive a 5,000 mile bonus. That is, 20,000 Starwood Preferred Guest points will equal 25,000 Alaska Airlines miles.