As we know, the gene is the physical and functional element of inheritance. Genes are made of DNA alone. Some genes are used as instructions for making protein molecules. The size of genes in humans varies between a few hundred DNA bases and millions of bases. As we know, genes are A, T, G, C. Genes. T-thymine, C-cytosol and C-Adenine. There are \[20,000\] genes in each cell in each body.Complete answer:
Polygene is a member of the non-epistatic group which interacts with a phenotypic characteristic. It thus contributes to the heritage of multiple genes. A trait is regulated by two pairs of genes in a polygenic heritage. Two people have crossed each other who are heterozygous to both genes. Thus, the genes that show the same feature are polygenic genes. And the feature is known as the polygenic feature collectively. A polygenic characteristic is controlled by several genes, with each gene's predominant allele expressing only part of the characteristic and all the characteristics only in the presence of the predominant alleles. Thus, different karyotype genes show polygons.
Example of the polygenic heritage is the color of human skin controlled by \[3\]polygenes pairs, A, B, C. The presence of all six dominant AABBCC contributive alleles is due to the black color. The presence of all six-recessive allele aabbcc non-contributive is very light or white.
The polygenic features show similar color, eye color, hair color, shape of the body, height and weight characteristics. Polygenic characteristics have many possible phenotypes determined by interactions between a number of ales. Polygene heritage differs from mendelian patterns, where the characteristics of a single gene are recognized.
Polygenic traits result in a distribution that resembles a bell-shaped curve. Polygenic traits do not exhibit complete dominance but they show incomplete dominance where the expressed phenotypes are a mixture of inherited traits.Note:
So, the features that polygenic genes demonstrate were discussed. Skin color, eye and hair are the most visible characteristics. The color characteristic of the eye is influenced by \[16\] genes. This is a difficult legacy. The quantity of brown pigment known as melanin determines it. The melamine is greater than hazel or green eyes in the black and dark brown eyes. There is no iris blue eye melanin. Chromosome \[15\] has been identified with genes influencing the color of the eye.