A mother who is blood type O can only pass an O allele to her son or daughter. A father who is blood type AB could pass either an A or a B allele to his son or daughter. This couple could have children of either blood type A (O from mother and A from father) or blood type B (O from mother and B from father).
At night, humans can use flashlights to spot animals that possess tapetum lucida by causing a phenomenon called eye shine.. Eye shine is the iridescent glow observed in animals when light is shone into their eyes, which floods the eye with light that is then reflected by the tapetum lucidum.
It all starts with the optic nerve. [Credit: Anne Cottingham] It can be upsetting to see things that arenât there, whether they be lights, shadows or pink elephants, but when people push their closed eyes, get migraines or even sneeze, they can see a variety of phantom lights and flashes.