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Gene interaction, images (25), 2nd gene ;b-black pigment .B-no pigment,…

- - - - The second gene move to the first .
        
        for example
        
        coat colour of labractor retrieurs is control by two gene (B& E)
      - the dominant allele of one of two gene governing a character produces phenotypic effect
      - definition
    - - Enzyme C & enzyme P cooprate to make a product .
        
        Example
        
        genotype CC or Cc
        
        enzyme
        
        precursors
        
        intermediate
        
        1 more item...
        
        Genotype ppp or Pp
        
        enzyme
    - - 3:Recessive epistasis
        
        epistatic gene exert its effect with homozygyus recessive genotype
        
        for example
        
        Petal colour in blue eye mary plant
        
        mm-magnet=,ww-white
        
        ratio.,
        
        1 more item...
        
        4:Dominent epistatic
        
        definition
        
        epistatic gene exert its effect with the presence of dominant allele
        
        Example : Fruit flower inn summer squash
        
        Y=yellow .yy+ green
        
        W=white .w=no effect
        
        5:Dominent Recessive interaction epistasis
        
        Sometime the dominant allele of one gene locus in homozygous state or heterozygous recessive allele of another gene produce the same phenotype
        
        example
        
        Gene BB or Bb producedblack colour
        
        1 more item...
        
        Definition
        
        altered & very rare blood group phenotype in which individual are phenotypically O but genotypically is A,B .or AB
        
        example of bombyphenotype
- - - - it
      - Gene 1;R Gene 2:p
      - F2G=R_P-walnut comb .R-pp-rose comb .rrP-peacomb .rrPP-single comb
      - F2generation consisting of chicken with 4 types of Comb
      - with the ratio of 9;3;3;1