Match column I with column II and find the correct answer Column I Column II (A) Monoploidy ( 1 ) 2 n - 1 (B) Monosomy ( 2 ) 2 n + 1 (C) Nullisomy ( 3 ) 2 n + 2 (D) Trisomy ( 4 ) 2 n - 2 (E) Tetrasomy ( 5 ) n ( 6 ) 3 n

( A ) - ( 5 ) , ( B ) - ( 1 ) , ( C ) - ( 4 ) , ( D ) - ( 2 ) , ( E ) - ( 3 )

( A ) - ( 5 ) , ( B ) - ( 2 ) , ( C ) - ( 4 ) , ( D ) - ( 1 ) , ( E ) - ( 3 )

( A ) - ( 6 ) , ( B ) - ( 5 ) , ( C ) - ( 3 ) , ( D ) - ( 4 ) , ( E ) - ( 2 )

( A ) - ( 2 ) , ( B ) - ( 1 ) , ( C ) - ( 3 ) , ( D ) - ( 6 ) , ( E ) - ( 5 )

( A ) - ( 1 ) , ( B ) - ( 5 ) , ( C ) - ( 3 ) , ( D ) - ( 2 ) , ( E ) - ( 4 )

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

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Albinism is a congenital disorder (non synthesis of melanin) resulting from the lack of the enzyme

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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>Ordinary Thinking>Q 53

Sometimes chromosome number increase or decrease due to

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 54

Match the following

	List-I		List-II
(A)	XX - XO, method of sex determination	(I)	$\underset{+}{o}$ Heterogametic
(B)	1.5X/A ratio	(II)	Turner's syndrome
(C)	Karyotype 45	(III)	Hemiptera
(D)	ZW - ZZ method of sex determination	(IV)	Metafemale

The correct match is

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 55

The idea of mutations was brought forth by

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 56

Edward syndrome is on account of .....

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 57

Sickle- cell anaemia is an autosome linked recessive trait that can be transmitted from parents to the offspring when both the partners are carrier for all the gene (or heterozygous). The disease is controlled by a single pair of allele, ${Hb}^{A} & {Hb}^{S}$ . Out of the three possible genotypes only homozygous individuals for $HbS ({Hb}^{S} {Hb}^{S})$ are lethal. Select the right option in which $X, Y$ and $Z$ are correctly identified

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 58

Pick out the correct statements
(i) Haemophilia is a sex-linked recessive disease
(ii) Down's syndrome is due to aneuploidy
(iii) Phenylketonuria is an autosomal dominant gene disorder
(iv) Phenylketonuria is an autosomal recessive gene disorder
(v) Sickle-cell anaemia is an X-linked recessive gene disorder

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 59

Match column I with column II and find the correct answer

	Column I		Column II
(A)	Monoploidy	$(1)$	$2 n - 1$
(B)	Monosomy	$(2)$	$2 n + 1$
(C)	Nullisomy	$(3)$	$2 n + 2$
(D)	Trisomy	$(4)$	$2 n - 2$
(E)	Tetrasomy	$(5)$	$n$
		$(6)$	$3 n$

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 60

Height is

Albinism is a congenital disorder (non synthesis of melanin) resulting from the lack of the enzyme

Important Questions on Principles of Inheritance and Variation

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