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

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

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Variations and Genetics
Chapter No. 8
Second Year
Multiple Choice Questions
Test No.2 (MCQ’s)
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 :  150
Book Version  :

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 : 150
Total Time :  150 minutes




1 / 150

All the genes present on a homologous pair of chromosome are linked to each other in the form of a :

2 / 150

When a single gene affects two or more traits or when a single gene has multiple phenotypic effect, the phenomenon is called:

3 / 150

Genes that affect growth rate in humans also influence:

4 / 150

The individuals called universal recipients have:

5 / 150

Green colour blindness is called:

6 / 150

An individual with a heterozygous genotype is a :

7 / 150

White eye gene in Drosophila also affects the shape of:

8 / 150

A chromosomes carries its linked genes en bloc in the form of a:

9 / 150

X and Y chromosomes are called sex-chromosomes because these have genes for determination of:

10 / 150

In cats, melanocyte failure causes both phenotypes, i.e.,

11 / 150

The form of appearance of a trait is called

12 / 150

In 1925 Bernstein explained the genetic basis of:

13 / 150

Partners of a gene pair are called:

14 / 150

T cells of immune system attack pancreas and destroy insulin producing:

15 / 150

The anaemic foetus starts to release many immature erythroblasts into his blood stream in:

16 / 150

Any group of sexually interbreeding organisms of the same species that exist together in both time and space is:

17 / 150

In humans, presence of 'SRY' gene on Y chromosome is essential for triggering the development of

18 / 150

The relationship between alleles of the same gene occupying the same locus is:

19 / 150

When the phenotype of the heterozygote is intermediate between phenotypes of the two homozygotes, it is called:

20 / 150

Test cross is a mating in which an individual showing a dominant phenotype is crossed with an individual showing its:

21 / 150

The male grasshopper has:

22 / 150

Some genes like bobbed gene in Drosophila are present.cn:

23 / 150

The gene for blue opsin is present on autosome:

24 / 150

ABO blood group system was discovered by:

25 / 150

The interaction between different genes occupying different loci is:

26 / 150

Some species like Ginkgo are:

27 / 150

The gene for eye colour in Drosophila is located on:

28 / 150

Exchange of chromosome segments logically means exchange of DNA, i.e.

29 / 150

SRY gene on Y chromosome of man determines:

30 / 150

The genes for red and green opsins are on:

31 / 150

Maternal - foetal (Erythroblastosis foetalis) incompatibility results when an Rh- woman, married to an Rh+ man conceives a child who is

32 / 150

Landsteiner and Levine discovered MN blood types in man on the basis of specific antigens present on:

33 / 150

Linked genes can be separated by:

34 / 150

SRY is the male determining gene which is located at the tip of short arm of:

35 / 150

The phenomenon of staying together of all the genes of a chromosome is called:

36 / 150

The number of linkage groups in man is:

37 / 150

Chances for a son or daughter in human birth are:

38 / 150

Mendel called the offspring of first parents as:

39 / 150

Genes for colour blindness, haemophilia, gout and hypophosphatemic rickets form one linkage group on human:

40 / 150

All the gene / alleles found in a breeding population at a given time are collectively called the:

41 / 150

Tritanopia is:

42 / 150

Pattern baldness is a:

43 / 150

Genes for sickle - cell anaemia and albinism make a linkage group on human chromosome:

44 / 150

The serum of O blood type contains:

45 / 150

Bilirum damages brain cells and turn skin and whites of the eye yellow. This condition is:

46 / 150

XXY individual produced through non disjunctional gametes in humans is a sterile male called:

47 / 150

The proportion of recombinant types between two gene pairs as compared to the sum of all combination is:

48 / 150

Human skin colour is also a quantitative trait which is controlled by:

49 / 150

The insulin gene is located on short arm of chromosome:

50 / 150

Linked genes do not obey Menders law of independent assortment, because these cannot assort independently during:

51 / 150

XO Turner's syndrome in humans produced through non- disjunction is sterile:

52 / 150

The total genetic information encoded in the total genes in a breeding population existing at a given time is:

53 / 150

An O recipient can only be given transfusion from a donor:

54 / 150

Diabetes mellitus type II is:

55 / 150

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

56 / 150

Secretors have dominant secretor gene "Se" on chromosome:

57 / 150

Drosophila males are :

58 / 150

ABO system has four different phenotypes which are distinct from each other on the basis of specific antigens on the surface of :

59 / 150

The homologous pairs of chromosomes in pea is:

60 / 150

Morgan raised cultures of Drosophila flies to study different traits, such as colour of the:

61 / 150

The amount of wheat grain colour is influenced by environmental factors:

62 / 150

Tallness in humans is recessive to:

63 / 150

A monochromat can perceive:

64 / 150

The inheritance of eye colour in Drosophil, some how seemed to be related to the:

65 / 150

The number of chromosomes in fruit fly, Drosophila melanogaster is:

66 / 150

About 20% haemophiliacs suffer from haemophilia B due to disturbance in factor:

67 / 150

The recombination frequency is directly proportional to the distance between the:

68 / 150

Intelligence is also a case of polygenic inheritance which is strongly influenced by:

69 / 150

An unusual white-eye male Drosophila fly mutant was observed by:

70 / 150

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

71 / 150

Diabetics are unable to metabolise blood:

72 / 150

ABO locus is on chromosome 9, while H locus is on chromosome:

73 / 150

Hereditary characteristics pass from parents to offspring through genes in their:

74 / 150

The type of sex determination found in Drosophila, man and many other organisms is:

75 / 150

Mendel called the trait that appeared in F1 as:

76 / 150

90% of all diabetic patients are:

77 / 150

A gene with multiple phenotypic effect is called :

78 / 150

A physiological effect of an allele over its partner allele on the same gene locus is:

79 / 150

An individual with a hornozygous genotype is a :

80 / 150

O blood has neither A nor B antigen, but it does have:

81 / 150

The form of appearance of a trait is:

82 / 150

80% haemophiliacs, suffer from haemophilia A due to abnormality of factor

83 / 150

Mendel presented his findings to Brunn Society for the study of Natural Science in.:

84 / 150

Less than 1% people suffer from haemophilia C due to reduction in factor.

85 / 150

Hypophosphatemic rickets is an X linked:

86 / 150

Diabetes mellitus type II accounts for _____ of all diabetic patients:

87 / 150

When two contrasting pairs of trait are followed in the same cross, then alleles assort independently in:

88 / 150

All the altered alternate forms of a gene, whose number is more than two, are called:

89 / 150

Red colour blindness is:

90 / 150

The breakdown product of RBC is called:

91 / 150

A sex- limited trait is limited to only one sex due to:

92 / 150

The true colour blindness is:

93 / 150

XX-XY type or WZ ZZ type of sex determination pattern was discovered by. J. Seiler in 1914 in:

94 / 150

The search for mechanism of inheritance of sex started after discovery of:

95 / 150

Mendel proposed that each contrasting form of a trait, e.g., roundness or wrinkledness of seed was determined by particulate hereditary factors, which are called:

96 / 150

The basic unit of biological information is:

97 / 150

Persons having genotype DD or Dd have Rh - factor on their RBC
and are:

98 / 150

Phenotype AB has neither anti-A nor anti-B antibodies in the:

99 / 150

If a man of M blood group marries a woman of N blobd group, all their children will have blood group:

100 / 150

A continuously varying trait is encoded by alleles of two or more different gene pairs found at different loci, all influencing the same trait in an:

101 / 150

Genes can be mapped on a chromosome on the basis of their recombination:

102 / 150

Rh - blood group system is named Rh after:

103 / 150

An X - linked recessive trait in which both red and green cone cells are absent is:

104 / 150

Mendel called the trait that appeared in F1 as:

105 / 150

Rh - antigen was first discovered in it by:

106 / 150

Mendel called the trait, which was hidden F1, as:

107 / 150

All such altered alternate forms of a gene, whose number is more than two, are called:

108 / 150

Each type of cone cell has specific light absorbing proteins called:

109 / 150

The blood serum containing antibodies is called:

110 / 150

The two coexisting alleles for each trait in an individual segregate from each other, so that each gamete receives only one of the two alleles:

111 / 150

Persons with genotype dd do not have Rh factor and are:

112 / 150

XO - XX type of sex determination is found in:

113 / 150

The blood serum of A phenotype contains:

114 / 150

Individuals called universal donors are:

115 / 150

The farther apart two genes lie, greater are chances of their separation through:

116 / 150

T. H. Morgan provided experimental evidence in support of chromosomal theory of heredity through discovery of sex linkage in fruit fly:

117 / 150

Blue cone monochromacy is also called:

118 / 150

Type I diabetes arises due to deficiency of pancreatic hormone:

119 / 150

A true - breeding variety upon self - fertilization always produced offspring identical to :

120 / 150

Normal trichromat c colour vision is based on three different kinds of cone cells in the:

121 / 150

The expression of ABO blood type antigens by IA or 1B gene depends upon the presence of another gene:

122 / 150

The X- and -Y linked genes are also called:

123 / 150

In Drosophila XO is a sterile:

124 / 150

The quantitative traits are called ,polygenic traits, and their genes are:

125 / 150

Type I diabetes is also called Juvenile diabetes because it usually occurs in early age before:

126 / 150

XX-XY type or WZ ZZ type of sex determination pattern is common in:

127 / 150

A Y - linked trait 'SRY' gene on Y chromosome determines:

128 / 150

Human height is a more complex:

129 / 150

Crossing over is an exchange of segments between non-sister chromatids of homologous chromosomes during:

130 / 150

In cats the dominant allele W not only makes fur pure white but also causes:

131 / 150

All chromosomes other than sex-chromosomes are called:

132 / 150

Morgan's discovery of sex-linked inheritance was a great contribution to the understanding of:

133 / 150

A dichromat can perceive two primary colours but is unable to perceive the one whose opsins are missing due to:

134 / 150

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

135 / 150

Allele for whiteness' in Drosophila is

136 / 150

The genetics of wheat grain colour was studied by:

137 / 150

The homologous chromosomes pair up length wise:

138 / 150

Humans have many X - linked traits of. which haemophilia and colour blindness- are:

139 / 150

A woman can be bald only when she is:

140 / 150

Genes are located at specific loci on

141 / 150

Chances for a man to be affected by haemophilia A & B than a woman are:

142 / 150

Rh - blood group system is defined on the basis of Rh factor present on the surface of:

143 / 150

The homologous pairs of chromosomes present in pea are:

144 / 150

Normal fruit flies, the wild type, have eyes:

145 / 150

A clear picture of the genetic basis of sex determination emerged after the discovery of :

146 / 150

B phenotype contains anti-A antibodies in the serum and agglutinate any RBC with antigen:

147 / 150

The position of a gene on the chromosome is called its:

148 / 150

Each allele of a gene pair occupies the same gene locus on its respective:

149 / 150

A gamete without any sex chromosome is called :

150 / 150

The chance of an event to occur is called:

Your score is

The average score is 53%


[mtouch quiz 194]

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