Acute pancreatitis signs and symptoms include: Upper abdominal pain; Abdominal pain that radiates to your back; Abdominal pain that feels worse after eating; Fever; Rapid pulse; Nausea; Vomiting; Tenderness when touching the abdomen; Chronic pancreatitis signs and symptoms include: Upper abdominal pain; Losing weight without trying; Oily, smelly stools (steatorrhea)
Rating Newest Oldest. Best Answer: Polygenic Inheritance: Human skin color is a good example of polygenic (multiple gene) inheritance. Assume that three dominant capital letter genes (A, B and C) control dark pigmentation because more melanin is produced.
Skin Color Adaptation. Human skin color is quite variable around the world. It ranges from a very dark brown among some Africans, Australian Aborigines, and Melanesians to a near yellowish pink among some Northern Europeans. There are no people who actually have true black, white, red, or yellow skin. These are commonly used color terms that do not reflect biological reality. Skin color is due primarily to the presence of a pigment called melanin , which is controlled by at least 6 genes. Both light and dark complexioned people have melanin. However, two forms are produced--pheomelanin , which is red to yellow in color, and eumelanin , which is dark brown to black.