Complex Pattern Of Inheritance
There are two possible phenotype's.
The human ABO blood type is a good example of multiple alleles. Humans can have red blood cells that are of type A , type B , or type O . These three different alleles can be combined in different ways following Mendel's Laws of Inheritance
So, the offspring in heterozygous will result in a new phenotype
Examples of incomplete dominance are:
A snapdragon flower that is pink as a result of cross-pollination between a red flower and a white flower when neither the white or the red alleles are dominant.
A brown fur coat on a rabbit as a result of one rabbit's red allele and one rabbit's white allele not dominating.
Offspring that are hetrozygous receive one version of the gene from each parent.
A cow with brown hair and a cow with black hair mate, therefore the offspring has both brown and black hair
If the male has A blood group and the female B blood group then the human offspring might have AB blood group
phenotypes are controlled by multiple genes.
Most polygenetic traits are partially influenced by the environment. For example, height is partially influenced by nutrition in childhood. If a child is genetically programmed to be average height but does not get a proper diet, he or she may be below average in size.