Exact model
A green pea seed
- Probability:
- 25%
- Odds:
- 1 to 3
- dBan
- −4.8 dBan
One of the four equally likely combinations from two plants carrying yellow and green variants produces a green seed. Green is recessive, so both parents must pass on that variant.
Calculation
p = 1 green combination / 4 combinations = 1/4
Assumptions
This Yy × Yy breeding setup uses a simple one-gene Mendelian model. Peas with other parent genes can have different chances.