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

Biology
Variations and Genetics
Chapter No. 8
Second Year
Multiple Choice Questions
Note : All MCQ’s selected in this test are from OLD F.Sc. board , UHS and PMC(Pakistan Medical Commission) Islamabad Papers.

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

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

A	epistasis
B	co-dominance
C	over dominance
D	pleiotropy

Question 2

The female in butterflies is

A	XY
B	X0
C	X
D	(aj XX

Question 3

Pattern baldness is (Mir Supp 13)

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

Question 4

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	Pleiotropy
D	Dominance

Question 5

Which of the following process can reduce variation?

A	Hybridization
B	Out breeding
C	Cross pollination
D	Inbreeding

Question 6

Erythrohlastosis foetalls itcharacterized by the symptom of

A	Death of baby
B	Fever
C	Heart problem
D	Jaundice

Question 7

The gene that triggers deVelopmental process towards maleness is:

A	tfm
B	BOB
C	SRY
D	MODY

Question 8

Blood group AB can receives

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

Question 9

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

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

Question 10

Which of followings He Is sterile female in man?

A	XO
B
C	XY
D	XX

Question 11

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

A	Multiple alleles
B	True breeders
C	Population
D	Genepool

Question 12

Haemophillia is (Mirpur Kashmir 2015)

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

Question 13

The trait found in 1/4 in F2 was

A	None of these
B	RR
C	rr
D	Rr

Question 14

Which of the followings is not multiple allele?

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

Question 15

The organisms produced by self cross different in one characters are

A	True breed
B	Monohybrids
C	Hybrid
D	Dihybrids

Question 16

The law of segregation gives genotypic ratio of F2 as

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

Question 17

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 18

In AB blood group IAIB is

A	incomplete dominance
B	Over dominance
C	Codominance
D	Complete dominance

Question 19

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

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

Question 20

The result of Mendelian Fl were all

A	RR
B	rr
C	None of these
D	Rr

Question 21

The sex chromosomes were discovered by

A	Correns
B	Sutton
C	Morgan
D	Bridges

Question 22

Green colorblindness is called: (Rawalpindi 2016)

A	Tritanopia
B	Protonopia
C	Deuteronopia
D	Protanomalous

Question 23

Blue Cone monochromacy is also called:

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

Question 24

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

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

Question 25

Locus is a

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

Question 26

In drosophila detemilnation of male depends on

A	XXY
B	XX
C	Autosome
D	X

Question 27

WZ-ZZ type of sex determination was discovered by:

A	Morgan
B	Seiler
C	Correns
D	Stewart

Question 28

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

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

Question 29

Mendelian inheritance is the inheritance of:

A	Haploids
B	Prokaryotes
C	Protists
D	Diploids

Question 30

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

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

Question 31

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

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

Question 32

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 33

Mendel In his, experiment, he did not consider:

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

Question 34

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

A	95%
B	80,%
C	90%.

Question 35

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

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

Question 36

Rh blood system was discovered by

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

Question 37

XO-XX type of sex determination is found in:

A	butterflies
B	grasshopper
C	moths
D	protenor bugs Mendel

Question 38

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

A	F1
B	F2
C	P1
D	F3

Question 39

Position of a gene on the chromosomes is called its:

A	Place
B	Locus
C	Habitat
D	Allelel

Question 40

A gamete without any sex chromosome is called:

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

Question 41

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

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

Question 42

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

A	Kinas gene
B	Galactoxinase gene
C	Proteinase
D	Glucokinase gene

Question 43

Which of the followings is homozygous

A	Ss
B	Tt
C	Rr
D	RR

Question 44

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

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

Question 45

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

A	Codominance
B	Overdominarice
C	Complete dominance
D	Incomplete dominance

Question 46

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

A	odaema
B	leucaemia
C	jaundice
D	thalassaemia

Question 47

How many varieties of garden pea were selected by Mendel?

A	7
B	17
C	14
D	2

Question 48

Erythroblastosis foetalis is caused

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

Question 49

Blodd group All can he donated to

A	A
B	AB
C	B
D	All of these

Question 50

The cross used to determined the genotype is called

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

Question 51

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

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

Question 52

The pattern of sex determination in birds is

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

Question 53

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

A	B
B	AB
C	O
D	None

Question 54

Phenotype is

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

Question 55

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

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

Question 56

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

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

Question 57

Rh can be donated to

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

Question 58

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

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

Question 59

In case of incomplete dominance

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

Question 60

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

A	three
B	two
C	four
D	one

Question 61

The genes located on the same chromosomes:

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

Question 62

Bbbed gene in-Drosophila are present on:

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

Question 63

In epistasis

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

Question 64

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

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

Question 65

Green colour blindness is called:

A	none of these
B	deuteranopia
C	tritanopia
D	protanopia

Question 66

An example of multifactorial trait in man is the:

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

Question 67

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

A	tongue rolling
B	diabetes
C	intelligence
D	pattern baldness

Question 68

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

A	over dominance
B	dominance
C	codominance
D	incomplete dominance

Question 69

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

A	Apomixis
B	Meiosis
C	Parthenocarpy
D	Mitosis

Question 70

Over dominance is

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

Question 71

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

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

Question 72

Mendelian laws are only applicable when:

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

Question 73

The product of hybridization is called:

A	Heterosis
B	Clone
C	Homozygons
D	Hybrid

Question 74

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

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

Question 75

Sex in yeast Is controlled by

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

Question 76

The genetic basis of ABO blood group system was discovered by

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

Question 77

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

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

Question 78

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 79

Sex chromosome are found in:

A	ginkgo
B	yeast
C	amaltas
D	none of these

Question 80

Mendelian factors were renamed as genes by (Sargodha 2016)

A	Correns
B	Mendel
C	Morgan
D	Johannsen

Question 81

Flower colour in 4o clock gives ratio in F2

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

Question 82

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

A	Heterozygous
B	Hemizygous
C	Homozygous Dominant
D	Homozygous Recessive

Question 83

The factors are recognized as:

A	Cromomeres
B	Chroniatin granules
C	Chromosomes
D	Genes

Question 84

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

A	None of these
B	Autogamete
C	Gamete
D	Nullo gamete

Question 85

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

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

Question 86

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

A	19
B	92
C	24
D	21

Question 87

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

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

Question 88

Tritinapia is also called as

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

Question 89

In pleiotropy

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

Question 90

Children of the Rh negative mother & Rh positive father:

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

Question 91

Human skin colour is controlled by gene pairs:

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

Question 92

Which of the followings is sterile male in Drosophila?

A	XY
B	XO
C	XXY
D	XX

Question 93

Bombay phenotype is an example of: (Fsd 2016)

A	Pleiotropy
B	Probability
C	Epistasis
D	Dominance

Question 94

The example of multiple allele is

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

Question 95

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

A	Bernstein
B	Waldayer
C	Landsteiner
D	Levine

Question 96

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

A	19
B	7
C	21
D	1 1

Question 97

SRY gene Is present on

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

Question 98

The hidden ratio of 3 : 1 in mendelian experiment

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

Question 99

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

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

Question 100

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

Question 101

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

Question 102

The genic system for determination of sex is present in :

A	Ascaris
B	Ginkgo
C	Yeast
D	Ant

Question 103

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

A	lungs
B	kidney
C	4iver
D	pancreas

Question 104

Mendel was born in the year:

A	1822
B	1884
C	1865
D	1801

Question 105

Which of the followings is true breeding variety?

A	Tt
B	Ss
C	Rr
D	RR

Question 106

All the genes found in an breeding population constitute:

A	Gene pool
B	Gene frequency
C	Genome
D	Genotype

Question 107

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

A	Dominant
B	Recessive
C	None of these
D	Hybrid

Question 108

The sex determining genes are found in:

A	grasshopper
B	ALL
C	drosophila
D	man

Question 109

Rte can be donoted to

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

Question 110

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

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

Question 111

The true colour blindness is

A	dichromacy
B	tetrachrpmacy
C	monochromacy
D	trichromacy

Question 112

WZ-ZZ type of sex determination was discovered in:

A	1904
B	1914
C	1934
D	1924

Question 113

Mendelian laws were first confirmed by:

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

Question 114

The blood group without antibody Is

A	O
B	None
C	AB
D	A

Question 115

ABOP blood group system was discovered by

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

Question 116

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

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

Question 117

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

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

Question 118

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

A	Morgan
B	Correbs
C	Bridges
D	De Vries

Question 119

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

A	Discoverer
B	A patient
C	Rhesus monkey
D	Rhino ceros

Question 120

The number of chromosomes present in female Ascaris is

A	35
B	40
C	42
D	45

Question 121

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

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

Question 122

The blood group without antigen is

A	None
B	O
C	A
D	AB

Question 123

Test cross is made to find out:

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

Question 124

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 125

Polio determine sex in certain plants was discovered by

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

Question 126

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

A	Wiener
B	Karl Landsteiner
C	Punnett
D	Bernstein

Question 127

Type 'l diabetes usually occurs in early age before:

A	30
B	20
C	50
D	40

Question 128

Law of segregation suggests that each gametes has

A	TT
B	Tt
C	tt
D	T

Question 129

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	A
B	B
C	AB
D

Question 130

The pattern of sex determination in man is

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

Question 131

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

A	Dominance
B	Epistasis
C	Overdominance
D	Codominance

Question 132

Drosophila males for eye colour are:

A	None of theSe
B	Homozygous
C	Heterozygous
D	Hemizygous

Question 133

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

A	Protein
B	Sugar
C	Fat
D	Urea

Question 134

Genotype is

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

Question 135

Which of the followings haemophilia, is autosomal recessive?

A	None
B	Type B
C	Type C
D	Type A

Question 136

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

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

Question 137

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

A	Dominance
B	Interaction of genes
C	Epistasis
D	Mutation

Question 138

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

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

Question 139

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

A	EpistPsiF
B	Genotype
C	Pleiotropy
D	Phenotype

Question 140

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

A	co-dominant
B	Recessive
C	Complementary
D	Epistatic

Question 141

True colour blindness is called:

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

Question 142

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

A	complete dominant
B	incomplete dominant
C	overdominant
D	codominant

Question 143

The person commonly known as father of Genetics is:

A	Mullar
B	Mendel
C	Morgan
D	Knight

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