Mendelian Inheritance

Hey guys, the answer is B. 2 only. Can someone please explain why 3 is incorrect?

Which of the following apply to Mendelian inheritance?

  1. It only applies to plants. → to all sexually reproducing organisms
  2. It treats different traits as either dominant or recessive.
  3. Heterozygotes have a 25% chance of expressing a recessive trait.

A. 1 only
B. 2 only
C. 3 only
D. 1 and 2
E. 1 and 3
F. 2 and 3
G. All of the above

heterozygous parents have 25 % chance of passing 2 recessive allele to their offspring . however a hetrozygous organism themself have 0% chance of expressing a recessive trait, because they have a dominant allele and a recessive allele the dominant allele masks the recessive . so only 2 is correct which is B.

Oh true true, I was confused for a while cuz I thought it was talking about the offspring of 2 heterozygotes. Thank you for the explanation

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you 're welcome, can i know where you got this question from ?

Sorry for the late reply, I got this from 700 BMAT practice questions book