From: a biology nerd and friends.
Mendel, popularly known as the father of genetics, coined the famous 9:3:3:1 phenotypic ratios that describe the genetic variations between progeny from a dihybrid cross. However, roughly 50 years later in the lab of another prominent geneticist, Thomas Hunt Morgan, a sophomore undergraduate…
“The colors in the feathers of a bird are determined two factors: pigment and structure. For example, the green in some parrots is a result of yellow pigments over blue-reflecting feathers. In the case of a white peacock, its unusual lack-of-color is due to a missing pigment. This missing pigment is dark and absorbs incident light, making diffracted and interference light visible (i.e. common peacocks). The effect is similar to that of oil on water.”
I had a request for some info on albinism. While this mutation can affect any species, the most information is offered for humans. Albinism is characterized by a lack of melanin in the eyes skin, and hair. Ocular albinism is more common than full albinism. All types of albinism are usually accompanied by poor vision. The genes associated with albinism have been identified in humans.
For more information, click through the picture. There are lots of useful links. Thanks to solongtodevotion for the request.