In pea plants, plant height, seed shape, and seed color are governed by three in
ID: 188751 • Letter: I
Question
In pea plants, plant height, seed shape, and seed color are governed by three independently assorting genes. The three genes have dominant and recessive alleles, with tall (T) dominant to short (t), round (R) dominant to wrinkled (r), and yellow (G) dominant to green (g).
a) If a true-breeding tall, wrinkled, yellow plant is crossed to a true-breeding short, round, green plant, what phenotype(s) are expected in the F1? Check all that apply.
-short round green
b) If a true-breeding tall, wrinkled, yellow plant is crossed to a true-breeding short, round, green plant, what phenotype(s) are expected in the F2? Check all that apply.
-tall round green
-short wrinkled yellow
-tall wrinkled green
-tall round yellow
-short round green
-short wrinkled green
-short round yellow
-tall wrinkled yellow
-tall wrinkled yellow -short wrinkled green -short wrinkled yellow -tall wrinkled green -tall round yellow -tall round green -short round yellow-short round green
b) If a true-breeding tall, wrinkled, yellow plant is crossed to a true-breeding short, round, green plant, what phenotype(s) are expected in the F2? Check all that apply.
-tall round green
-short wrinkled yellow
-tall wrinkled green
-tall round yellow
-short round green
-short wrinkled green
-short round yellow
-tall wrinkled yellow
Explanation / Answer
a) In the F1, all of them will be tall, round and yellow.
b) In case of F2, 27 out of 64 will be tall, round and yellow; 9 out of 64 will be tall, round and green; 9 out of 64 tall, wrinkled, yellow; 9 out of 64 short, round, yellow; 3 out of 64 tall, wrinkled, green; 3 out of 64 short, round, green; 3 out of 64 short, wrinkled, yellow & 1 out of 64 will be short, wrinkled, green.