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.
Light that passes through the retina is reflected off the tapetum, giving the retinal cells a second chance to sense it. This makes some animalsâ eyes shine in the glare of car headlights. The color you see is the pigment on the inner layer of the retina. At the heart of all vision is the retina, which contains two types of light-sensing cells: rods and cones.