User:Nikhil venkat konagala/Dominance (genetics)

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Gregor Johann Mendel introduced the idea of dominance. He is known as father of genetics and coined the word in 1860. He noticed there were two distinct phenotype of garden peas for a number of characteristics relating to the seeds emergence, seed plants and pods like wrinkled seeds versus round, green versus yellow seeds, white versus red blossoms, short versus tall plants. This plants consistently generate similar phenotype when bred independently, another generation. When different types of phenotype are interbred (linked), the progeny exhibited the phenotype of one parent (Tall, or red, or tall, or round).qz

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Complete Dominance

In dominance, complete is a type that is in a heterozygous state where an allele termed dominant totally masks the result of a recessive allele. The trait they represent will be expressed as individual carrying 2 alleles which are dominant. However, if a person carries two alleles, one of which is dominant and the other one is recessive, dominant allele will manifest itself, whilst the recessive allele would not. As a result, the dominant heterozygote (Aa) will have the same phenotype (AA). This state is referred to as complete dominance.

Here are different examples of total dominance


 * Eye color
 * Mendel’s Peas

Eye color

A typical example of complete dominance is very frequently seen in eye color. In humans, eye color is influenced by numerous genes, which all code for the six primary eye colors Amber, Blue, and Brown. These colors depend on the amount of melanin in the iris. Brown is most common eye color in world, most of world’s population has brown eyes. Thus, the brown color termed the dominant trait. People with brown eyes have a significant amount of melanin in their eyes. Blue eyes are known for being one of the most mesmerizing eye colors in the world. However, blue is quite rare. Only 8-10% of the world’s population has blue eyes, with the majority concentrated in Europe. This makes it the world's second to most minor popular eye color. Blue-eyed persons have the least amount of melanin present in the eyes.