Detail the Polygenic Hypothesis for the inheritance of Quantitative Traits.
Answers
The phenotypic trait contributes for quantitative measure of which gene inherits polygenic characters. The skin colour variation in humans is an example of polygenic traits.
The following points explain how polygenic trait is used for inheritance of Quantitative traits,
1. Many genes are involved in changing the skin colour. So, change in skin colour can be done by modifying in any of those genes.
2. There are many disorders with components of genes which are polygenic. The disorder includes autism, diabetes, and cancer.
3. The quantitative trait locus is a part of DNA which is linked with phenotypic trait and it contributes to the polygenic effects.
4. The different chromosomes have quantitative traits in it. The trait's genetic architecture is explained by number of quantitative trait locus.
5. Many small effect genes and few large effect genes are used in controlling the height of plants.