Why is the law of segregation universally accepted?

Answer
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Hint: Law of segregation is universally acknowledged with no exclusion. Law of segregation is that each trait is composed of 2 alleles, which segregate through the development of gametes and 1 allele from each parent merge in the course of fertilization. Mendel's laws are acceptable for all sexually breeding organisms, as well as garden peas and humans. But these laws prevent short of describing some forms of genetic inheritance.

Complete answer:
Mendel’s law of segregation is universally accepted because it has not a single exception.
Law of segregation states that during the development of gametes, two alleles for every single trait separate and combine at random with other alleles during fertilization.
Together both parents donate to the factors of offspring equally. If alleles of a set are heterozygous, 1 is dominant and another is recessive, alleles are not muddled, the dominant one evidently expresses. The recessive traits have a tendency to resurface in the successive generation.
When the parent is homozygous dominant, it indicates that a test cross resulted in all dominant progeny and when a test cross results in a 1: 1 ratio offspring it indicates that the parent is heterozygous.
There is no conflicting model suggesting that alleles mix in the offspring so far, therefore it is recognized and applicable universally.

Note:
The law of segregation says that each entity that is a diploid has a set of alleles for a specific trait. Each parent gives an allele at chance to their offspring resulting in a diploid organism. The allele that comprises the dominant trait decides the phenotype of the progeny. Throughout gamete development, the alleles for each gene separate from each other so that each holds only one allele for every gene.