Most Helpful Guy
It's really just the "skin" or "peel" of the banana that turns yellow.
The following is taken from Wikipedia here: https://en.wikipedia.org/wiki/Banana#Ripening
"The vivid yellow color consumers normally associate with supermarket bananas is, in fact, caused by the artificial ripening process."
"Ripening bananas fluoresce a bright blue color when exposed to ultraviolet light. This property is attributed to the degradation of chlorophyll, leading to the accumulation of a fluorescent product in the skin of the fruit. The chlorophyll breakdown product is stabilized by a propionate ester group. Banana-plant leaves also fluoresce in the same way. Green bananas do not fluoresce. The fluorescence allows animals which can see light in the ultraviolet spectrum to more easily detect ripened bananas or may add protection against ultraviolet exposure, like a sunscreen, allowing the fruit to remain fresh longer."0
Most Helpful Girl
ok, ill tell you.
now bananas are usually green when they're babies, and they hang out in bunches on trees as you know. When they become teenagers, the male bananas pick on the female bananas. The female bananas get REALLY angry, and just as hulk turns green, bananas turn yellow. Then the female bananas poison the male bananas and the male bananas become yellow as well.
Therefore, all the teenage bananas are yellow and they remain so until adulthood, where they are taken and sold in a supermarket near u.1