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1
RE-NEET 2026
MCQ (Single Correct Answer)
+4
-1

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : In an experiment, Mendel observed that the F1 progeny plants are all tall and none are dwarf.

Reason R : Stem height is a contrasting trait, with tall being dominant and dwarf being recessive.

In the light of the above statements, choose the most appropriate answer from the options given below :

A

$\mathbf{A}$ is not correct but $\mathbf{R}$ is correct

B

Both $\mathbf{A}$ and $\mathbf{R}$ are correct and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$

C

Both $\mathbf{A}$ and $\mathbf{R}$ are correct but $\mathbf{R}$ is not the correct explanation of $\mathbf{A}$

D

$\mathbf{A}$ is correct but $\mathbf{R}$ is not correct

2
RE-NEET 2026
MCQ (Single Correct Answer)
+4
-1

For a person with blood group 'O', which of the following is not a possible combination of parents' blood group genotypes?

A

Father : $I^A I^B$ and Mother : $I^A i$

B

Father : $A_i$ and Mother : $A_i$

C

Father : $A_i$ and Mother : $A_i$

D

Father : $I B i$ and Mother : $I B i$

3
RE-NEET 2026
MCQ (Single Correct Answer)
+4
-1

Given below are two statements :

Statement I : Down's syndrome is caused by the absence of one of the X-chromosomes.

Statement II : Turner's syndrome is caused by the presence of an additional copy of the chromosomes.

In the light of the above statements, choose the correct answer from the options given below:

A

Statement I is incorrect but Statement II is correct

B

Both Statement I and Statement II are correct

C

Both Statement I and Statement II are incorrect

D

Statement I is correct but Statement II is incorrect

4
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

$$ \text { Match List I with List II : } $$

List-I
(Phase of cell cycle)
 List-II
(Activity)
A. Incomplete dominance I. Human skin colour
B. Co-dominance II. Inheritance of flower colour in Antirrhinum sp.
C. Pleiotropy III. Phenylketonuria disease in humans
D. Polygenic inheritance IV. ABO blood groups

Choose the correct answer from the options given below :

A

A-II, B-IV, C-III, D-I

B

A-I, B-III, C-II, D-IV

C

A-I, B-IV, C-III, D-II

D

A-II, B-I, C-III, D-IV

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