Pheno and geno
Asked by SSHHII
| 18th Sep, 2009,
02:11: PM
In plants like 4-0-clock (Mirabilis jalapa) and snapdragon (Antirrhinum) ,if red flowered plants are crossed with white flowered ones, F1 produces all pink flowers. Dominance thus appears to be partial or incomplete. In F2, we get red, white and pink flowers. Parents RR (red) × rr(white)
Gametes R × r
│________________________│
│
F1 Rr(pink)
Selfing Rr × Rr
Male gametes→ Female gametes↓ |
|
|
|
RR(red) |
Rr(pink) |
|
Rr(pink) |
rr(white) |
In F2 generation, the phenotypic ratio of red:pink:white flowers = 1:2:1.
The genotypic ratio is RR:Rr:rr = 1:2:1. Thus it can be seen that phenotypic and genotypic ratios are same.
Answered by
| 24th Sep, 2009,
03:27: PM
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Sign Up
Verify mobile number
Enter the OTP sent to your number
Change