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Principles of Inheritance question bank (Zoology)

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Q1.

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)

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

(B)

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

(C)

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

(D)

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

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Q2.

Which one of the following disorders is caused by the substitution of Glutamic acid (Glu) by Valine (Val) at the sixth position of the beta globin chain of the haemoglobin molecule ?

(A)

Thalassemia

(B)

Sickle-cell anaemia

(C)

Phenylketonuria

(D)

Haemophilia

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