Question

What are the rules directing polygenic heredities?

Answer 1

Polygenic heredities:

1. Polygenic heredities are those hereditary traits that are determined by three or more genes.
2. They include characters like height, weight, skin colour, eye colour, hair type, shape of the body, etc.

Following are the rules that direct polygenic heredities:

1. The occurrence of dominant traits: The number and nature of the dominant gene will impact the polygenic heredity since it will be expressed over the recessive alleles of that gene.
2. The amplitude of variations: Every gene will be expressed in a particular quantity. This quantity will vary between individuals and will depend on a number of environmental and genetic factors.