Saturday, July 4, 2015

CO-DOMINANCE AND INCOMPLETE DOMINANCE

CO-DOMINANCE AND INCOMPLETE DOMINANCE

After the discovery of Mendel’s work, scientists began experiments on the genetics of various organisms. These experiments proved that all the trait in organisms do not follow Mendel’s laws.
For example, it was found that there are many traits which are controlled by more than one pair of genes. Similarly for many traits there are more than two alleles in a gene pair. Co-dominance and incomplete dominance are two examples of such deviations from Mendel’s laws.
Co-dominance is the situation where two different alleles of a gene pair express themselves completely, instead of showing a dominant-recessive relationship. As a result, the heterozygous organism shows a phenotype that is different from both homozygous parents.

In-complete dominance is the situation where, in heterozygous genotypes, both the alleles express as a blend and neither allele is dominant over the other. As a result of this blending, an intermediate phenotype is expressed.

No comments:

Post a Comment

Thank for Comments.