Biology Chapter No. 8 Variations and Genetics 2nd Year Online MCQs

Biology
Variations and Genetics
Chapter No. 8
Second Year
Multiple Choice Questions

Book Name : Biology
Chapter No. 08
Chapter Name : VARIATIONS and Genetics
Total MCQ from Text Book : 143
Book Version : 2020
Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ’s
Exam conduct By : Inter Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal
Class / Grade : 12th ( F.Sc. Intermediate)
Total Marks : 143
Total Time : 72 minutes

GRADE 12 - BIOLOGY CHAPTER NO.8 VARIATIONS & GENETICS

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GRADE 12 - BIOLOGY CHAPTER NO.8 VARIATIONS & GENETICS

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Question 1

The sex chromosomes were discovered by

A	Morgan
B	Bridges
C	Correns
D	Sutton

Question 2

Green colorblindness is called: (Rawalpindi 2016)

A	Deuteronopia
B	Protanomalous
C	Tritanopia
D	Protonopia

Question 3

The result of Mendelian Fl were all

A	RR
B	Rr
C	None of these
D	rr

Question 4

What is the risk of a colour-blind child In a family when mother is colour

A	75%
B	50%
C	100%
D	25%

Question 5

Human skin colour is controlled by gene pairs:

A	Three to six
B	Six to ten
C	Two to four
D	Four to six

Question 6

The hidden ratio of 3 : 1 in mendelian experiment

A	1:01
B	3:01
C	2:01
D	1:1:1:1

Question 7

Both husband and -wife have blood group A. Which of the followings blood grotip can present In their offspring?

A	None
B	B
C	O
D	AB

Question 8

Flower colour in 4o clock gives ratio in F2

A	1:01
B	None of these
C	1: 2 1
D	3:01

Question 9

Which of the followings is true breeding variety?

A	Tt
B	Ss
C	RR
D	Rr

Question 10

If the cell of an organism heterozygous for two pairs of genes representedby Aa, undergoes meiosis, then the possible genotypic combination of gametes will be:

A	Aa, Bb
B	Aa, aB, Ab, ab
C	AB,ab
D	Date insufficient

Question 11

The cross used to determined the genotype is called

A	Dihybrid cross
B	Monohybrid cross
C	Reciprocal cross
D	Test cross

Question 12

In honey bee males sperm are produced by: (Lahore 2015 Group II)

A	Meiosis
B	Parthenocarpy
C	Mitosis
D	Apomixis

Question 13

Blue Cone monochromacy is also called:

A	blue - green colour blindness
B	red colour blindness
C	red-green colour blindness
D	blue colour blindness

Question 14

Green colour blindness is called:

A	deuteranopia
B	none of these
C	protanopia
D	tritanopia

Question 15

Mendelian factors were renamed as genes by (Sargodha 2016)

A	Morgan
B	Mendel
C	Correns
D	Johannsen

Question 16

Mendel In his, experiment, he did not consider:

A	Quantity in relation to quality
B	Qualitative characters
C	Quality as well as quantity
D	Quantitative characters

Question 17

When a haemophilia carrier woman marries a normal man, who among her offspring may be affected?

A	half of her sons
B	half of her children
C	all her children
D	all her daughters

Question 18

The gene for blue opsin is present on autosome D.G.Khan 2015 Group II)

A	19
B	21
C	7
D	1 1

Question 19

Position of a gene on the chromosomes is called its:

A	Habitat
B	Place
C	Allelel
D	Locus

Question 20

An example of sex-limited trait in humans is the:

A	none of these
B	long hair
C	beard
D	thick skin

Question 21

WZ-ZZ type of sex determination was discovered in:

A	1914
B	1924
C	1934
D	1904

Question 22

The genic system for determination of sex is present in :

A	Ascaris
B	Ginkgo
C	Ant
D	Yeast

Question 23

Which of the followings is homozygous

A	Tt
B	Rr
C	Ss
D	RR

Question 24

When one gene does not allow the expression of other non-allelic gene, it is referred to as:

A	Epistasis
B	Mutation
C	Interaction of genes
D	Dominance

Question 25

WZ-ZZ type of sex determination was discovered by:

A	Correns
B	Stewart
C	Seiler
D	Morgan

Question 26

How many varieties of garden pea were selected by Mendel?

A	7
B	14
C	2
D	17

Question 27

A man with blood group AB married to a woman with blood group A. Which of the following blood group cannot be found in their offspring?

A	AB
B	A
C
D	B

Question 28

If there is cross- between round and yellow with wrinkle and green, the F2 gives Round yellow

A	2 / 16
B	3 / 16
C	1 / 16
D	9 / 16

Question 29

Which phenomenon reduces the chances of genetic recombination & variations among offspring?

A	linkage and crossing over
B	none of these
C	crossing over
D	linkage

Question 30

Pattern baldness is (Mir Supp 13)

A	sex-limited trait
B	Sex-influenced triat
C	sex-linked trait
D	Autosomal-linked trait

Question 31

The children of the parents having blood group 'A' & 'AB' may belong to blood groups:

A	'A' & 'AB'
B	'A' & 'B'
C	.& 'AB'
D	'A' ,'AB' &

Question 32

In F2 generation, which forms are true breeds?

A	Only dominant forms
B	All recessive 8 one third dominant forms
C	Only recessive forms
D	All

Question 33

Chances of genetic recombination are minimized due to (Rawalpindi 2015)

A	Independent assortment of chromosomes
B	Crossing over
C	Gene linkage
D	Mutation

Question 34

Blood group 'A' can be transfused only Into (Mirpur 12)

A	. A and AB
B	A and 0
C	Only B and 0 rcipients
D	Only B

Question 35

In epistasis

A	One gene interfere the affect of the other
B	One gene hide the affect of other
C	All of the above
D	interaction between different genes occurring at different loci

Question 36

Mendel was born in the year:

A	1801
B	1822
C	1884
D	1865

Question 37

XO-XX type of sex determination is found in:

A	butterflies
B	grasshopper
C	protenor bugs Mendel
D	moths

Question 38

The gene that triggers deVelopmental process towards maleness is:

A	MODY
B	tfm
C	BOB
D	SRY

Question 39

Which of the following trait is transmitted directly from an affected father to

A	Y-linked
B	X-linked
C	autosomal
D	X & Y linked

Question 40

Which of the followings is not multiple allele?

A	Skin colour
B	Human height
C	MN Blood group
D	ABO blood group

Question 41

Bombay phenotype is an example of: (Fsd 2016)

A	Epistasis
B	Probability
C	Dominance
D	Pleiotropy

Question 42

The number of chromosomes present in female Ascaris is

A	45
B	42
C	35
D	40

Question 43

Which of the followings haemophilia, is autosomal recessive?

A	Type C
B	Type A
C	Type B
D	None

Question 44

Bilirubin damages brain cells and turn the skin and whites of eyes yellow, condition is known as " (D.G.Khan 2016 Group II)

A	Jaundice
B	Botulism
C	Leukaemia
D	Hepatitis

Question 45

Any group of inter breeding organisms of the same species that exist together in both time and space is called:

A	Genepool
B	Multiple alleles
C	Population
D	True breeders

Question 46

A baby born alive in spite of maternal foetal Rh incompatibility may suffer from severe haemolytic anaemia and:

A	jaundice
B	thalassaemia
C	leucaemia
D	odaema

Question 47

The pattern of sex determination in man is

A	XO-XX
B	XX-XY
C	XY-XX
D	Coinpounds sex chromosomes

Question 48

Blue Cone Monochromacy is an x-linked trait in which:

A	Green Cone Cells are absent
B	Red COne Cells are absent
C	Blue Cone Cells are absent
D	Both Red and Green Cone Cells are absent

Question 49

If there is cross between round and yellow with, wrinkle and green, the F2 gives Wrinkle green:

A	16-Feb
B	16-Sep
C	16-Mar
D	16-Jan

Question 50

Rh can be donated to

A	Rh
B	Rh+ & Rh
C	ALL
D	Rh+

Question 51

This cross finds out the homozygous or heterozygous nature of the genotype: (Fsd 13)

A	Back cross
B	Self cross
C	Dihydride cross
D	Test cross

Question 52

What is the risk of a colour-blind child in a family when father is colour

A	100%
B	zero %
C	50%
D	25%

Question 53

Diabetes mellitus type II accounts for, F of all diabetic patients?

A	80,%
B	90%.
C	95%

Question 54

Which of these traits zigzags from maternal grand father through a carrier daughter to a grandson?

A	autosomal
B	X & Y linked
C	Y-linked
D	X-linked

Question 55

In test cross if the parent whOse genotype is to be determined is heterozygous then it gives

A	100% recessive
B	None of these
C	100% dominant
D	50% dominant .& 50% recessive

Question 56

Mendelian laws were first confirmed by:

A	Muller on Guinea pigs
B	None of these
C	Correns on Mirabilis
D	Morgan on Drusophila

Question 57

Mendelian inheritance is the inheritance of:

A	Haploids
B	Prokaryotes
C	Diploids
D	Protists

Question 58

An example of multifactorial trait in man is the:

A	all of these
B	hepatitis
C	blood pressure
D	black hair

Question 59

Phenotype is

A	Form of appearance of a trait
B	Partner of gene on chromosomes
C	None of the above
D	Genetic complement of an individual

Question 60

The trait found in 1/4 in F2 was

A	Rr
B	rr
C	None of these
D	RR

Question 61

Drosophila males for eye colour are:

A	Homozygous
B	Heterozygous
C	None of theSe
D	Hemizygous

Question 62

The blood group without antibody Is

A	O
B	A
C	AB
D	None

Question 63

MN blood group system is example of; (Fsd 2015, Mirpur Kashmir 2016)

A	Incomplete dominance
B	Overdominarice
C	Codominance
D	Complete dominance

Question 64

Rte can be donoted to

A	None of these
B	Rh-
C	Rh+ & Rh-
D	Rh+

Question 65

The true colour blindness is

A	monochromacy
B	trichromacy
C	tetrachrpmacy
D	dichromacy

Question 66

In AB blood group IAIB is

A	Complete dominance
B	incomplete dominance
C	Over dominance
D	Codominance

Question 67

Different alleles of a gene that 'are both expressed in a heterozygous condition are called:

A	codominant
B	overdominant
C	incomplete dominant
D	complete dominant

Question 68

The genes located on the same chromosomes:

A	can assort independently and cannot assort independently
B	can assort independently
C	cannot assort independently
D	none of these

Question 69

ABO blood group system was discovered by: (Mtn .2015)

A	Levine
B	Waldayer
C	Bernstein
D	Landsteiner

Question 70

An Rh woman Is married to Rh man.The risks of Erythroblastosis foetalis baby can be

A	. 9
B	1 : 1
C	3 : 1
D	All of these

Question 71

Which of the following process can reduce variation?

A	Hybridization
B	Inbreeding
C	Cross pollination
D	Out breeding

Question 72

The factors are recognized as:

A	Genes
B	Cromomeres
C	Chroniatin granules
D	Chromosomes

Question 73

Mendelian laws are only applicable when:

A	The characters are on separate chromosomes
B	Parents are True breed
C	Parents are True breed & F1 shows 2 types of individuals
D	F1 shows 2 types of individuals

Question 74

Sex in yeast Is controlled by

A	MAT
B	XO-XY
C	XX-XY
D	SRY

Question 75

If the children of the parents of blood group 'A' have 'A' & '0' groups , then the genotypes of the parents must be:

A	I Ai &I Ai
B	IAIA&IAi
C	1A1 &A IAIA
D	1A1 &A IAIA and IAIA&IAi

Question 76

When different alleles of a gene are both expressed in heterozygous condition. It is called: (Fsd 14, Sargodha 2013)

A	Overdominance
B	Dominance
C	Epistasis
D	Codominance

Question 77

The organisms produced by self cross different in one characters are

A	Monohybrids
B	Hybrid
C	Dihybrids
D	True breed

Question 78

Children of the Rh negative mother & Rh positive father:

A	May always be -ve
B	may never be -ve
C	may always be + ve
D	May be + ve or

Question 79

Erythrohlastosis foetalls itcharacterized by the symptom of

A	Jaundice
B	Heart problem
C	Death of baby
D	Fever

Question 80

Rh blood system was discovered by

A	Carl correns
B	T.H. Morgan
C	Landsteiner
D	Bernstein

Question 81

Sex chromosome are found in:

A	ginkgo
B	none of these
C	amaltas
D	yeast

Question 82

In human beings, atrait which is dominant in males & recessive in females is the:

A	tongue rolling
B	intelligence
C	diabetes
D	pattern baldness

Question 83

is the form of appearance of a trait. (Multan 2016)

A	Pleiotropy
B	Phenotype
C	Genotype
D	EpistPsiF

Question 84

The cross in which two characters are followed at the same time is called

A	Monhybrid cross
B	Dihybrids cross
C	Reciprocal cross.
D	Hybrid cross

Question 85

When a gene or gene pair at one locus, interferes with or hides the effect caused by another gene or gene pair at another ldcus, the phenomenon is:

A	Codominance
B	Epistasis
C	Dominance
D	Pleiotropy

Question 86

Law of segregation suggests that each gametes has

A	TT
B	Tt
C	tt
D	T

Question 87

Which of the followings is sterile male in Drosophila?

A	XXY
B	XO
C	XY
D	XX

Question 88

In case of incomplete dominance

A	Exceed the quantity than phenotype
B	Phenotype of the heterozygous is intermediate
C	Both alleles are expressed
D	One allele is completely dominant over other

Question 89

The example of multiple allele is

A	Rh blood group system
B	MN blood group system
C	ABO blood group system
D	ALL

Question 90

Who for the first time found white eye mutant in drosophila;

A	Morgan
B	Correbs
C	De Vries
D	Bridges

Question 91

Which of followings He Is sterile female in man?

A
B	XX
C	XY
D	XO

Question 92

Diabetios are unable to metabolize blood: (Sargodha 11, Rawalpindi 2013)+A129

A	Sugar
B	Fat
C	Urea
D	Protein

Question 93

Blood group AB can receives

A	ALL
B	Only blood group O
C	Only blood group B
D	Only blood group A

Question 94

In drosophila detemilnation of male depends on

A	Autosome
B	XX
C	XXY
D	X

Question 95

ABO-blood groups in man is a hereditary character which is controlled by a set of:

A	multiple alleles
B	two genes
C	three genes
D	two alleles

Question 96

Over dominance is

A	Phenotype of the heterozygous is intermediate.
B	Both alleles are, expressed
C	Exceed the quantity than phenotype
D	One allele is completely dominant. over other

Question 97

Haemophillia is (Mirpur Kashmir 2015)

A	Sex limited trait
B	X-linked recessive trait
C	Sex influenced trait
D	X-linked dominant trait

Question 98

Glucokinase enzyme usually converts glucose to glucose-6- phosphate in

A	kidney
B	pancreas
C	4iver
D	lungs

Question 99

In a dibybrid cross, the ratio comes to be 9 : 3 : 3 : 1 for seed shape and seed colour, what Would be the ratio betWeen an allele of seed shape in this case

A	3:01
B	1:01
C	1:1:1:1
D	2:01

Question 100

When a single gene has a multiple phenotypic effects called: -

A	co-dominance
B	over dominance
C	epistasis
D	pleiotropy

Question 101

Haemophilia C: (D. G. Khan 14, Bahawalpur 2013,Lahore 2015)

A	Affects women more than men
B	Affects both sexes equally
C	Is non-allelic recessive sex-linked
D	Affects men more than women

Question 102

A gamete without any sex chromosome is called:

A	gamete
B	nullo gamete
C	autogamete
D	sex-gamete ,

Question 103

Blodd group All can he donated to

A	A
B	All of these
C	B
D	AB

Question 104

Rh blood group system is named after its : (Lahore 2016 Group I)

A	Discoverer
B	Rhino ceros
C	A patient
D	Rhesus monkey

Question 105

Bbbed gene in-Drosophila are present on:

A	Y- chromosome
B	X -chromosome
C	X & Y - chromosomes -
D	autosomes

Question 106

SeCretors have daminant secretor gene "Se" on chromosome:(Lahore 2014)

A	21
B	24
C	19
D	92

Question 107

All the genes found in an breeding population constitute:

A	Genome
B	Gene pool
C	Genotype
D	Gene frequency

Question 108

The blood group without antigen is

A	A
B	AB
C	None
D	O

Question 109

A gamete without any sex-chromosome is called: (Mirpur 14)

A	Autogamete
B	Gamete
C	None of these
D	Nullo gamete

Question 110

In 1901, BO group system was discovered by (Multan 2014, 15, Grw 2014)

A	Karl Landsteiner
B	Punnett
C	Bernstein
D	Wiener

Question 111

True colour blindness is called:

A	blue-colour blindness
B	blue-green colour blindness
C	red-green colour blindness
D	red colour blindness

Question 112

ABOP blood group system was discovered by

A	Carl Correns
B	None
C	T.H. Morgan
D	Landsteiner

Question 113

If the parents belong to blood group 'A' & 'B' but all the groups are represented among their children , their genotype must be:

A	008,1BiB.
B	IAi&IBIB
C	01AmBi
D	moi&oi

Question 114

The female in butterflies is

A	(aj XX
B	X0
C	X
D	XY

Question 115

Locus is a

A	Part of DNA
B	Partner of gene
C	Position of gene
D	Complement of genes

Question 116

Type 'l diabetes usually occurs in early age before:

A	40
B	30
C	50
D	20

Question 117

When round wrinkle were cross, it gave all round. This round is

A	F1
B	F3
C	P1
D	F2

Question 118

When an allele falls to express itself in the presence of the other allele, the former is said to be:

A	Recessive
B	co-dominant
C	Epistatic
D	Complementary

Question 119

Test cross is made to find out:

A	None
B	Phenotype of suspected individual
C	Genotype of suspected individual
D	Successfulness of hybridization

Question 120

An albino woman married to normal male whose father was albino. The ratio of their albino in their off spring will be

A	3:01
B	1:01
C	All normal
D	All albino

Question 121

Tritinapia is also called as

A	.'horie of these
B	red blindness .
C	blue blindr4ss
D	green blindness

Question 122

What happen when both alleles of a gene pair independently express in a heterzygote:

A	co-dominance
B	incomplete dominance
C	over dominance
D	dominance

Question 123

The person commonly known as father of Genetics is:

A	Mendel
B	Morgan
C	Knight
D	Mullar

Question 124

The product of hybridization is called:

A	Hybrid
B	Clone
C	Homozygons
D	Heterosis

Question 125

A heterozygote offspring quantitatively exceeds the phenotypic expression of both the homozygo to parents due to:

A	dominance
B	codominance
C	over dominance
D	incomplete dominance

Question 126

The law of segregation gives genotypic ratio of F2 as

A	1:02:01
B	2:01
C	3:01
D	4:01

Question 127

How many gene pairs contribute to the wheat grain colour? (Grw 2016)

A	two
B	three
C	one
D	four

Question 128

About 50% cases of MODY are caused by mutations in :

A	Glucokinase gene
B	Galactoxinase gene
C	Kinas gene
D	Proteinase

Question 129

The genetic basis of ABO blood group system was discovered by

A	Carl Correns
B	Landsteiner
C	Bernstein
D	T. H. Morgan

Question 130

Erythroblastosis foetalis is caused

A	Rh- main marries to Rh- woman
B	Rh+ man marries to Rh- woman
C	Rh+ man marries to Rh+ woman
D	Rh" man marries: to Rh+ woman

Question 131

The pattern of sex determination in birds is

A	XY-XX
B	Compounds sex
C	ZZ-WZ
D	XO-XX

Question 132

SRY gene Is present on

A	None of the above
B	X chromosome
C	Y chromosome
D	Both A and B

Question 133

If test cross gives 50% dominant and 50% recessive characters it means the parent is

A	Heterozygous dominant
B	Homozygous dominant
C	Heterozygous recessive
D	Homozygous recessive

Question 134

different alleles of a gene that are both expressed in a heterozygous condition are called

A	incomplete dominance
B	Co-dominance
C	Over-dominance
D	Dominance

Question 135

A woman can be bald only when she is: (Bahawalpur 12, Mirpur 13)

A	Homozygous Recessive
B	Heterozygous
C	Hemizygous
D	Homozygous Dominant

Question 136

From a cross AaBBX iaB13 'following genotypic ration will be- obtain in F1 generation:

A	all AaBB : No aaBB
B	1 AaBB : 1 aaBB
C	3 AaBB : 1aaBB
D	1 AaBB : 3aaBB

Question 137

A dwarf plant (pea) which. is treated with GA, grows as tall as the tall, the ratio in the offsprings will be:

A	Tall & dwarf in equal proportion
B	3 1
C	All dwarf plants
D	AD tail plants

Question 138

The sex determining genes are found in:

A	drosophila
B	grasshopper
C	man
D	ALL

Question 139

In pleiotropy

A	One gene hide the affect of other
B	One gene affects two or more traits
C	One gene interfere.the affect of the other
D	One gene dominate other gene

Question 140

Polio determine sex in certain plants was discovered by

A	None of these
B	Nilsson Ehle
C	T.H. Morgah
D	Carl Correns

Question 141

Genotype is

A	Genetic complement of an individual
B	None of the above
C	Form of appearance of a trait
D	Partner of gene on chromoomes

Question 142

Which of the following trait is not sex-linked recessive?

A	tfm 'syndrome
B	hypophosphatemic rickets
C	haemophilia
D	colour blindness

Question 143

When tall is crossed with dwarf, F, gives tall, it is

A	Recessive
B	Dominant
C	Hybrid
D	None of these

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