Question

What is dominant epistasis, give example.

Answer 1

Hint: Once the associate degree gene at one locus will mask the expression of each allele at another locus. In alternative words, the expression of 1 gene is disguised by another cistron. This can be conjointly noted as a straightforward epistasis process.

Complete answer:
The dominant epistasis process happens once the dominant gene of 1 cistron masks the expression of all alleles of another cistron. If an associate degree organism inherits one or 2 copies of the dominant gene, it'll have the attribute. The diagram given below shows that the inheritance pattern for a trait that shows dominant epistasis when both parents are heterozygous for the trait.
Fruit and flower change plants may be a common example accustomed to illustrate the dominant epistasis process. As shown during this figure, the squash comes in three colors. Yellow (AA, Aa) is dominant over inexperienced (aa). However, since squash color is heritable, or determined by over one cistron, Gene B conjointly determines squash color. As a result of Gene B showing epistasis is a process, it's a lot more necessary than Gene A in determinative squash color.

Additional information:
In the recessive epistasis process, when recessive alleles at one locus mask the expression of each (dominant and recessive) alleles at another locus. This sort of cistron interaction is additionally called a supplementary organic process. A decent example of such cistron interaction is found for grain change maize.

So, one example of Dominant epistasis is Fruit color in squash’.

Note:
During this form of the epistasis process, a dominant gene at one locus will mask the expression of each (dominant and recessive) alleles at the second locus. This can be conjointly called inhibitory gene interaction. An associate degree example of this sort of gene interaction is found for anthocyanin pigmentation in rice.