Step-by-step explanation:
Self-incompatibility
It is one of the widespread mechanism in the flowering plants which avoids the inbreeding and promotes the outcrossing .
The SI response is controlled genetically by one or more multi - alleic loci , and relies on the series of the complex cellular interactions between the pistil and the slef - incompatible pollen .
The function of SI is to prevent the process of self - fertilization .
Mechanism of Self - incompatibility -
The mechanism of SI is based on , protein - protein interactions .
For example ,
For single locus termed as S , which has many different allens in the species population .
Due to similar genetic and morphological manifestation , the mechanism have involved independently , and are based on different cellular components , Hence , each mechanism has its own unique S - genes .