In the first filial generation F1 all the descendants are Yellow carriers of Recessive White and red eyes

When you intercross the F1 progeny you may obtain the following recombination of gametes:

YB             Yb              yB                yB

PHENOTYPE RESULTS

9:3:3:1

 

9.Yellow black eyes

 

3. Yellow red eyes

 

3 Rec. White black eyes

 

1. Rec. White red eyes

Simplified symbols:

 

Y = Yellow

y = not yellow

B = black eyes

b = not black eyes

 

Uppercase dominant

 

Lowercase recessive

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