Characteristic Inheritance

Characteristic Inheritance

The words dominant and recessive are terms used to describe inheritance patterns of certain characteristics. This is particularly used in humans. Humans have two copies of each chromosome that come from the parents. Because of this, humans have two variations of genes and these diverse types of genes are called alleles. These can either be dominant or recessive are used to describe the inheritance patterns of specific characteristics. These terms can also be used to refer to the probability of a trait being inherited to the offspring, such as bronchial disorders. If someone inherits a dominant attribute, it will appear rather than then other phenotype.

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A dominant trait will only reveal its phenotype on the offspring if dominant alleles reveal more than recessive even though it only has one copy of allele. This is called heterozygous. In different conditions, if the alleles are different it’s known as hybrid. It’s known as hybrid because of the two unique alleles; it is not purebred. When both alleles are there, among them will cover up another one. The one that “masks”, or the stronger one, is known as dominant. If the allele for having brown eyes is dominant over blue eye, then only 1 copy of this allele is required for the individual to have blue eyes. This leads the individual expressing that attribute because this certain gene is being more “dominant” than the other one.

Recessive alleles can only show its phenotype when it is paired, or combined with another allele that is identical to itself. In simpler terms, recessive alleles can only be visible if the individual has two copies of this allele. Having two alleles to show a certain gene is known as homozygous. As mentioned, if the two alleles are present, the dominant will hide the weaker the allele, or the recessive. By way of example, the allele for having blue eyes is recessive and for a person to express that trait, he/she must have two copies of blue eye allele. Because of this, this trait is not as common as it becoming dominant.

In conclusion, the significance of prominent traits is that an allele is “stronger” to the recessive allele because it will show its phenotype on the offspring. The definition of recessive is it’s allele which phenotype will not appear on the offspring due to it only having one allele. Homozygous is when the gene has an individual has two of the same alleles.


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