Expert: Walter Hintz - 10/16/2008

Question
I'm having some difficulty setting the following up....In the radish plant,the long and round traits exhibit lack of dominance and the heterozygotes have an oval shape. The red and white color traits also lack of dominance and heterozygotes have a purple color. Two oval-shaped, purple plants are crossed.What phenotypic ratio would the offspring show? Thank you and much appreciated

Answer
Here is how I interpret this problem Ther eis incomplete dominance here.  Crossing red and white plantsgives us purple
 Let R  = Red
     r = white so the genotype of a purple plant is Rr
 Now ther is something wrong with plant shape here Both long and oval  cannot be recessive. I must assume taht the genotype for oval is oo
 so cross is
Rroo     x    RRoo

    Ro      ro
Ro  


ro