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NEET 2019
Exam
NEET
Year
2019
Subject
Zoology
Chapter
Principles of Inheritance and Variation

NEET 2019 · Zoology · Principles of Inheritance and Variation

In Antirrhinum (Snapdragon), a red flower was crossed with a white...

In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation, pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following.

Options

  1. AThe experiment does not follow the principle of dominance.
  2. BPink colour in F1 is due to incomplete dominance.
  3. CRatio of F2 is 14\dfrac{1}{4} (Red) :24: \dfrac{2}{4} (Pink) : 14\dfrac{1}{4} (White)
  4. DLaw of Segregation does not apply in this experiment.

Correct answer

D. Law of Segregation does not apply in this experiment.

Step-by-step solution

Law of Segregation:

A pair of alleles for a pair of contrasting characters are brought together in a hybrid, they remain associated but not blend, and they segregate into gametes during gamete formation. This law is based on the fact that the two factors of a character present in an individual do not get mixed up (blending) and both the traits are recovered as such in the F2 generation though one of these is not seen at the F1 stage. During gametes or spore formation, factors of a pair separate or segregate from each other, so that a gamete carries only one factor of a character. This ensures the purity of gametes. Of course a homozygous parent produces all gametes that are similar while a heterozygous will produce two type gametes each having one factor with equal proportion. This law is universally applicable.

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