(A) $H.J. Muller$ was awarded the Nobel Prize in Physiology or Medicine in $1946$ for his discovery that mutations can be induced by $X$-rays. This gr

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Discovering that ionising radiations can cause mutation

(A) $H.J. Muller$ was awarded the Nobel Prize in Physiology or Medicine in $1946$ for his discovery that mutations can be induced by $X$-rays. This groundbreaking work demonstrated that ionising radiation acts as a mutagen,significantly advancing our understanding of genetics and the mechanisms of evolution.

Class 12 Biology Principles of Inheritance and Variation Mutation

Easy

$H.J. Muller$ was awarded the Nobel Prize for:

A
Discovering that ionising radiations can cause mutation
B
Gene mapping in $Drosophila$
C
Reduction in nuclear weapons
D
Discovering that chemicals can cause gene mutation

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Class 12

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Chapter

Principles of Inheritance and Variation

Subtopic

Mutation

Match the columns:

Column-$I$ Column-$II$

$(1)$ Lethal mutation $(a)$ Mutation caused by external factors

$(2)$ Spontaneous mutation $(b)$ They are metabolic errors

$(3)$ Induced mutation $(c)$ As a result the mutant dies

$(4)$ Biochemical mutation $(d)$ Most of the mutations occurring in nature are of this type

Column-$I$	Column-$II$
$(1)$ Lethal mutation	$(a)$ Mutation caused by external factors
$(2)$ Spontaneous mutation	$(b)$ They are metabolic errors
$(3)$ Induced mutation	$(c)$ As a result the mutant dies
$(4)$ Biochemical mutation	$(d)$ Most of the mutations occurring in nature are of this type