What is heterozygot?

Heterozygot is an organism that has two different forms of the same gene, one is the dominant form and the other recessive form. Genes are functional units that transmit hereditary information when organisms are reproduced. They occur in pairs and have different forms, one dominant form and at least one recessive form, called alleles. Alleles can be paired in different ways, such as one dominant with one recessive allele, two recessive alleles together, or two dominant alleles together. Different alleles occur in heterozygote, while one of two similar pairs may occur in homozygota.

Dominance is the ability of the allele to expresses your phenotype or observable properties defined by its genetic code, while the phenotype of another allele is unrecognized. A common example is eye color in humans. Brown is a dominant feature while blue is recessive. If a person has one allele for the color of brown eyes and one for blue, the eyes of a person will be brown because brown are the distantomineantenna. Such a person is said to be heterozygous for eye color.

When heterozygot shows evolutionary condition greater than homozygot, this phenomenon is known as a heterozygot advantage or simply excessive dominance. Many experts think that evolutionary disadvantages can be preserved in the gene fund in this phenomenon. If you have two copies of an allele is an evolutionary disadvantage, it is expected that it disappears from the gene fund with a natural selection. However, it can be maintained if one copy paired with another allele is to represent an evolutionary advantage.

A standard example of the textbook is anemia of sickle cells. The recessive allele of a particular human gene is caused by anemia of sickle cells, which is disadvantageous for the prospects of the organism for survival and reproduction. When it is associated with another allele of the same gene, However, Gene a couple grants the body's resistance to a deadly disease called malaria. Such a resistance can significantly improve the DecreeIndividuals for survival and reproduction in the areas of the world where malaria is. It is assumed that there are many other examples of heterozygous benefits, but other explanations need to be ruled out for them. For example, some rats show the advantage of pesticides resistance, which seems to be associated with a disadvantage of deficiency in vitamin K levels. Another example is a heterozygot advantage in female pigeons with a lower microbial infection and higher egg hatching rates.

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phenomenon opposite the heterozygous advantage is, of course, known as heterozygot a disadvantage or undersene. A specific kind of grass was found, which is a possible example of undommodation. Heterozygous members of the natural population of this species have been found to produce fewer viable seeds than homozygots of a gate species.