In peas, yellow seed color is dominant to green. Give the expected proportion of
ID: 58790 • Letter: I
Question
In peas, yellow seed color is dominant to green. Give the expected proportion of each color in the offspring of the following crosses:
A. a heterozygous yellow with a heterozygous yellow
B. a heterozygous yellow with a green
C. a green with a green
a. 3/4 yellow, 1/4 green; b. 2/4 yellow, 2/4 green; c. 4/4 green
a. 1/4 yellow, 3/4 green; b. 4/4 yellow; c. 4/4 green
a. 2/4 yellow, 2/4 green; b. 3/4 yellow, 1/4 green; c. 2/4 yellow, 2/4 green
a. 4/4 yellow; b. 2/4 yellow, 2/4 green; c. 4/4 yellow
a. 3/4 yellow, 1/4 green; b. 4/4 yellow; c. 3/4 yellow, 1/4 green
A.a. 3/4 yellow, 1/4 green; b. 2/4 yellow, 2/4 green; c. 4/4 green
B.a. 1/4 yellow, 3/4 green; b. 4/4 yellow; c. 4/4 green
C.a. 2/4 yellow, 2/4 green; b. 3/4 yellow, 1/4 green; c. 2/4 yellow, 2/4 green
D.a. 4/4 yellow; b. 2/4 yellow, 2/4 green; c. 4/4 yellow
E.a. 3/4 yellow, 1/4 green; b. 4/4 yellow; c. 3/4 yellow, 1/4 green
Explanation / Answer
a. 3/4 yellow, 1/4 green; b. 2/4 yellow, 2/4 green; c. 4/4 green
A. Cross between a heterozygous yellow with a heterozygous yellow = Yy* Yy = YY, Yy, yY, yy
YY, Yy, Yy ---------------------> Yellow (3/4); yy -----------> Red (1/4)
B. Cross between a heterozygous yellow with a green = Yy* yy = Yy, Yy, yy, yy
Yy, Yy ---------------------> Yellow (1/2 or 2/4); yy, yy-----------> Red (1/2 or 2/4)
C. Cross between a green with a green, yy* yy = 100% yy (4/4 green)