Question

Write the dihybrid cross of a round yellow seed and wrinkled yellow seed. ( RrYy * rrYy)

Answer 1

RrYy------ GAMETES=Ry RY rY ry
rrYy--------GAMETES= rY ry


FERTILIZATION
Ry x rY------RrYy (round and yellow)
Ry x ry------Rryy (round and green)
RY x rY-----RrYY (round and yellow)
RY x ry-----RrYy (round and yellow)
rY x rY------rrYY(wrinkled and yellow)
rY x ry------rrYy (wrinkled and yellow )
ry x rY------rrYy (wrikled and yellow)
ry x ry-----rryy(wrinkled and green)


RESULT 
PHENOTYPE RATIO : round and yellow=3
                                     round and green=1
                                     wrinkled and yellow=3
                                     wrinkled and green=1
GENOTYPIC RATIO : RrYy=2
                                    Rryy=1
                                    RrYY=1
                                    rrYY=1
                                    rrYy=2
                                    rryy=1