Apentix/AP Biology/Ap bio u5/Question
AP Biologymediummcq1 pt

Based on the data, which of the following would be the most likely outcome of crossing a plant with genotype RR (tall) with a plant with genotype rr (short)?

A.A) All offspring would exhibit the tall trait
B.B) All offspring would exhibit the short trait
C.D) The offspring would exhibit a combination of tall and short traits
D.C) 50% of offspring would exhibit the tall trait and 50% the short trait

Explanation

Core Concept

Based on the data, if the RR plant (tall) is crossed with the rr plant (short), all offspring would inherit the short trait (r) from the rr plant and the tall trait (R) from the RR plant would not be expressed. This is because the short trait is dominant over the tall trait. Option A is incorrect because the tall trait is recessive and will not be expressed in the offspring. Option C is incorrect because the offspring would not exhibit a 50:50 ratio of tall to short traits. Option D is incorrect because this scenario does not demonstrate a combination of tall and short traits.

Correct Answer

B) All offspring would exhibit the short trait

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