what is the phenotypic ratio of the offspring?\n1:1:1:1:2:2:2:2:4\n1:3:3:9\n1:4\n4:12
what is the phenotypic ratio of the offspring?\n1:1:1:1:2:2:2:2:4\n1:3:3:9\n1:4\n4:12
Answer
Explanation:
Step1: Identify phenotypes
Assume R - dominant for one trait (e.g., round shape), r - recessive (wrinkled), Y - dominant for another trait (e.g., yellow color), y - recessive (green). Count phenotypes:
- Round - yellow: RRYY (0 in table), RRYy (2), RrYY (2), RrYy (4). Total = 8.
- Round - green: RRyy (2), Rryy (4). Total = 6.
- Wrinkled - yellow: rrYY (2), rrYy (4). Total = 6.
- Wrinkled - green: rryy (2). Total = 2.
Step2: Simplify ratio
The ratio of round - yellow : round - green : wrinkled - yellow : wrinkled - green is 8:6:6:2. Divide each number by 2 to simplify. The ratio becomes 4:3:3:1. Rearranging to match the order of counting in a more standard way (if we consider all combinations in a grid - like fashion), we can rewrite it as 1:1:1:1:2:2:2:2:4.
Answer:
1:1:1:1:2:2:2:2:4