This is a problem with dominant epistasis. Suppose we are dealing with a flower color. The dominant allele P results in purple flower color, regardless of the gene at locus W. If there is no P allele, WW or Ww results in pink color, and ww results in white color. If two double heterozygotes from F1 are crossed, figure out the F2 results in terms of genotypes and phenotypes and giving a final phenotypic ratio. show punnett square PpWw x PpWw
Answer:
PpWw (purple) x PpWw (purple)------ parents
| PW | Pw | pW | pw | |
| PW | PPWW (purple) | PPWw (purple) | PpWW (purple) | PpWw (purple) |
| Pw | PPWw (purple) | PPww (purple) | PpWw (purple) | Ppww (purple) |
| pW | PpWW (purple) | PpWw (purple) | ppWW (pink) | ppWw (pink) |
| pw | PpWw (purple) | Ppww (purple) | ppWw (pink) | ppww (white) |
Phenotypic ratio = 12:3:1
P_W_ or P_ww = purple
ppW_ = pink
ppww = white
This is a problem with dominant epistasis. Suppose we are dealing with a flower color. The...
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