Polygenic Inheritance (10.3)
Terms in this set (3)
The definition of polygenic inheritance is...
...a single characteristic that is controlled by two or more genes.
Polygenic inheritance contributes to human skin color by...
...increasing the number of genes (there can be as many as 4). When this happens, the phenotypic variation increases. The alleles in this control the pigment that controls the skin color, which is called melanin. (A or B = 1 unit; a or b = 0 units).
Polygenic inheritance contributes to finch beak depth by...
...using the three genes with two alleles. (A, B or C = depth by 1 unit; a, b, or c = no depth).