instructure.com/courses/1303756/quizzes/1741029/take When crossing a true-breedi

Question

instructure.com/courses/1303756/quizzes/1741029/take When crossing a true-breeding red snapdragon flower with a true- breeding white flower of the same species, we secure all pink offspring. This would seem to support the pre-Mendel view that inheritance is a blending of parental traits. However, both Mendel and we know that "blending" of parental traits is not correct and that individual alleles are actually involved because Two red flowers produce red flowers. Two red flowers produce white flowers. Two white flowers produce white flowers Two pink flowers produce red and white flowers Two pink flowers produce red, white and pink flowers Question 20

Explanation / Answer

Last option is correct i.e. “Two pink flowers produce red, white and pink flowers”

Reason: - In the case of first generation when red flower crossed with white flower they produce the pink flower. When F2 generation self crossed i.e. two pink flowers, they will produce the 1 red, 2 pink and 1 white flower.

Red Flower (RR) X White Flower (rr)

Pink Flower (Rr)

Pink Flower (Rr) X Pink Flower (Rr)

R

r

R

RR

Rr

r

Rr

rr

Red Flower (RR) = 1

White Flower (rr) = 1

Pink Flower (Rr) = 2

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