4. When dominant purple color flower (PP) are crossed with recessive white (pp), then the progenies will have the ratio of Purple: White is
(1) 1:2:1 (2) 3:1
(3) All purple (4) 2:2
Monohybrid Cross: PP × pp
Alleles
Purple allele: P (dominant)
White allele: p (recessive)
Parents
Parent 1 (purple): de>PP
Parent 2 (white): de>pp
Parent 2 (white): de>pp
Gametes
de>PP parent produces only de>P gametes
de>pp parent produces only de>p gametes
F1 Zygotes
| de>P | |
| de>p | de>Pp |
All offspring: de>Pp → Purple flowers (P dominant)
Phenotypic ratio: Purple : White = 4 : 0
All purple → Option (3)
All purple → Option (3)
✅ Correct Answer: Option (3) All Purple
