Question

explain how polygenic inheritance differs from that resulting from the action of a single pair of alleles. pick a specific way and discuss it. Also, add citation at the end.

Answer 1

Ans :

Single pair of allele :

  Mendelian traits are determined by a single gene and inherited in a simple fashion that follows the laws of inheritance described by Mendel. If each parent is heterozygous (has two different variants of a given gene), 3/4 of their progeny will have the "dominant" version of the trait, while 1/4 will have the "recessive" version. The parents may also be homozygous, in which case they have two identical copies of the gene. If one parent is homozygous for the dominant version of the gene while the other parent is homozygous for the recessive form, all their progeny would be heterozygous.

Polygenic inheritance:

Polygenic traits are much more complex than Mendelian traits. Rather than being shaped by a single gene alone, a polygenic trait is influenced by multiple genes. In humans, eye color and skin color are two of the most well-known examples. There isn't a single gene for darker brown or lighter white skin; rather, there are multiple genes, and the combination you inherit determines your skin color. Many different combinations are possible, so humans exhibit many different shades of skin color.

  Polygenic traits are much more complex than Mendelian traits. Rather than being shaped by a single gene alone, a polygenic trait is influenced by multiple genes. In humans, eye color and skin color are two of the most well-known examples