Match the column-I with column-II and choose the correct option: Column I Column II A Incomplete Dominance I Hershey and Chase B Linkage II Antirrhinum sp. C Transforming principle III Griffith D Proved that DNA is the genetic material IV Morgan

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

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

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

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

A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F 1 plants were selfed the resulting genotypes were in the ratio

1 : 2 : 1 :: Tall homozygous : Tall heterozygous : Dwarf

1 : 2 : 1 :: Tall heterozygous : Tall homozygous : Dwarf

E M B I B E

NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Critical Thinking>Q 22

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Earn 100

Which of the following best illustrates FEEDBACK in development

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Important Questions on Principles of Inheritance and Variation

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Critical Thinking>Q 23

Match the column-I with column-II and choose the correct option:

	Column I		Column II
A	Incomplete Dominance	I	Hershey and Chase
B	Linkage	II	Antirrhinum sp.
C	Transforming principle	III	Griffith
D	Proved that DNA is the genetic material	IV	Morgan

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Critical Thinking>Q 24

The fruit fly Drosophila melanogaster was found to be very suitable for experimental verification of the chromosomal theory of inheritance by Morgan and his colleagues because

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Critical Thinking>Q 25

The exchange of one part of a chromosome to the other part of same or another chromosome is called
Or

The movement of gene from one linkage group to another is called

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Critical Thinking>Q 26

If the number of chromosomes in most body cells of a mammal is 40, the cells in the seminiferous tubule will have

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Critical Thinking>Q 27

How many nucleosomes are found in helical coil of $30 n m$ chromatin fibre

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Critical Thinking>Q 28

Biological marriage of one of the following should be avoided
Or

After examining the blood groups of a couple, the doctor advised them not to have more than one child. The blood group of the couple are likely to be
Or

In which of the following situations, is there a risk factor for children of incurring erythroblastosis foetalis

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Critical Thinking>Q 29

The primary source of allelic variation is

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Critical Thinking>Q 30

Persons with the following syndrome have a tendency of tall structure, mental defects and a strong antisocial behaviour