Final answer:
The major product of an aldol condensation is an alpha, beta-unsaturated aldehyde or ketone, which forms through nucleophilic attack of an enolate on another aldehyde or ketone followed by dehydration.
Step-by-step explanation:
The major organic product from an aldol condensation reaction is typically an alpha, beta-unsaturated aldehyde or ketone. During aldol condensation, an enolate is first formed by deprotonation of an aldehyde or a ketone. This enolate then acts as a nucleophile and attacks another molecule of an aldehyde (or a ketone), forming an aldol. Upon dehydration, the aldol loses a molecule of water to give the condensation product, which is an alpha, beta-unsaturated aldehyde if the original compound was an aldehyde, or an alpha, beta-unsaturated ketone if the original compound was a ketone.