INHERITANCE
INHERITANCE
MENDEL's LAWS OF
1.
Among the
seven
pairs of contrasting traits
in pea
related to flower,
Mendel, the number of traits
were
pod and seed respectively
(b) 2, 2, 1
(a) 2,2, 2
(d) 1, 1, 2.
(c) 1,2, 2
studied
(a) 1
(c) 3
8.
(a)
3:1
(b) 1:2 :1
(c)
1:1
(d)
2
(d)
4.
(c)multiple allelism
pairs of contrasting traits
were
studied
2:1.
ABO blood grouping in human beings cites the example
(b)
incomplete dominance
co-dominance
(d) both (b) and ().
by Mendel
9.
9
(a) 6
(b)
7
To determine the genotype of a tall plant of F, generation,
Mendel crossed this plant with a dwart plant. This cross
(c) 8
(d)
10
represents a
Which of the following are reasons for Mendel's success?
() Usage of pure lines or pure breeding varieties.
(i) Consideration of one character at a time.
(in) Maintenance of statistical records of experiments.
(iv) Knowledge of linkage and incomplete dominance.
(a) () and (i) only
(b) ), (i) and (ii)
()
and
(iv)
only
(c)
(d) (i), (ii) and (iv)
6.
for the inheritance of flower colour would be
contrasting
in pea plant.
5.
In Antirrhinum (dog flower), phenotypic ratio in F, generation
of
(a)
(b)
colour based contrasting traits in seven
pairs, studied by Mendel in pea plant were
4.
7.
by
2. The
3.
plant as
OF ONE GENE
Which of the following characters was not chosen
Mendel?
(a) Pod shape
(b) Pod colour
(c) Location of flower
(d) Location of pod
Read the
given statements and select the
Statement 1 Mendel worked
on
(a)
test cross
(c)
reciprocal cross
(b) back cross
(d) dihybrid cross.
10. Some of the dominant traits studied by Mendel were
(a) round seed shape, green seed colour and axial flower
position
(b)
(b) terminal flower position, green pod colour and inflated
pod shape
by
correct
option.
garden pea (Pisum
sativum).
Statement 2 Garden pea belongs to family Malvaceae.
(a) Both statements 1 and 2 are correct and statement 2
is the correct explanation of statement 1.
(b) Both statements 1 and 2 are corect but statement 2
is not the correct explanation of statement1.
(c) Statement 1 is correct and statement 2 is incorrect.
(d) Both statements 1 and 2 are incorrect.
(c)
violet flower colour, green pod colour, round seed
shape
(d) wrinkled seed shape, yellow pod colour, and axial
flower position.
11. Genes which code for
a
pair of contrasting traits are known
as
(a) dominant genes
(c) linked genes
(b) alleles
(d) none of these.
12. The inheritance of flower colour in Antirhinum
(dog
is an example of
(a) incomplete dominance
(b) co-dominance
()multiple alleles
(d) linkage.
flower)
Principles or e i l d i i c e d a variation
which
is
an
thalassaemia,
13. In four o' clock
plants,
gene for red
flower colour (R)
incompletely dominant over the gene
for white filower
rolour (t), hence the plants heterozygous for
flower colour
(Rr) have pink flowers. What will be the
ratio of
offsprings
in a cross between red
the
is
flowers and
pink
(a) 75% red flowers, 25% pink flowers flowers?
All red flowers
(c)50% red flowers, 50%
(b)
(d)
pink flowers
Red: pink : white::1:2:1
distribution of phenotypic features in the
first filial generation after a cross between a
female and a heterozygous male for a single homozygous
locus.
3:1
1:1
16. Complete the given table showing different possibilities of
genotypes and their corresponding blood group, by selecting
the correct option.
Genotypes
ii)
iv)
(i)
(ii)
(ii)
AA
BB
BB
AIB
(a)
(b) AA
(c)
AB
AB
AB
Ai
(d)
25%
(18) Inheritance of roan
coat
(c)
No chance
19.
475, 25
50%
crossed
showed
about the gene
The alleles
(a)
perfect
coat
controlling
controlling
of gene
coat
recessive
gene
The alleles of
controlling
incompletely dominant.
C)The alleles
colour
show
a
relationship.
dominant
of gene
controlling
coat
colour are
coat colour are
co-dominant.
None of these.
(d)
in
when it is expressed
be recessive,
22. An allele is said to
condition only
(a) heterozygous
condition only
(6) homozygous
(c) Fa generation
and heterozygous
(d) both homozygous
()
75%
(d)
100%.
(iv)
conditions.
first filial generation
24. The characters which appear in the
are called
a) recessive characters
Ai
(b) dominant characters
(c) holandric characters
(d) lethal characters.
25
100%
an
r0an
generation
produced in F, juxtaposition of small
offspring
coat. Their
due to
produced
be assumed
effect is
What can
coat. This
colour.
white
cattle?
red and
colour in
patches of
cow
50%
in cattle is
having white
bull
with a
(b)
example
of
A tobacco
plant heterozygous
for
a
recessive character is
self-pollinated and 1200 seeds are subsequently germinated.
How many seedlings would have the parental genotype?
(b) 600
(a) 1250
(c) 300
(d) 2250
26. Which of the following crosses will give tall and dwarf pea
plants (Tt),
a
(b)
250, 250
(d)
350, 150
plants in same proportions?
(a) TTx t
(b)
total of
On crossing
What will be
obtained in F, generation.
were
500 plants
and awan plan a
the respective number of tall
(
is
100%
(d)
25%
tall
two heterozygous
(a) 375, 125
coat
(b)
(a)
of these.
F generation?
with red
an
generation is
codominance
none
in
AB
(c) multiple allelism
(d)
affected
25%
( a ) incomplete dominance
(b)
child?
B
of dwarf offsprings
17. What is the probability of production
in a cross between tvwo heterozygous tall pea plants?
(b) 50%
(a) Zero
(c)
are
what
the chances of
individuals,
between two heterozygous
23. In a monohybrid cross
individuals obtained inF,
percentage of pure homozygous
Blood groups
1B1B, i )
disorder,
resulting
(a)
(6)
15. A child has blood group '0'. If father has blood
group 'A'
and mother has blood group 'B', work out the
genotypes
of the parents.
(a) AA and Bj
(b) Ai and
(c) Ai and ii
(d) ii and B8
(d)
pregnancy
(b) 1:2:1
(d) None of these
are
for
recessive
autosomal
21. A
14, What will be the
(a)
(c)
parents
( 2 0 If both
carriers
27.
(c) TTxTt
Which of the following
(a) TTxTT
(c) ttxtt
Tt x tt
(d) ttx tt
is
a
test cross?
(b) TtxTt
(d) Ttx tt
28. Fruit
shape
in
shephered's purse (Capsella bursa)
is of two
Triangular fruit shape (T)
types-triangular and top-shaped.
table summarizes
is dominant over top-shape (t). Following
the results of several crosses.
Result
Cross
Strain1xtt
Strain 4
x
Tt
triangular:1top-shaped
All top-shaped
3 triangular : 1 top-shaped
fur and y is
In mice, Y is the dominant allele for yellow
when
lethal
Y
is
Since
fur.
the recessive allele for grey
homozygous, the
30/
result of
(a)
3 yellow: 1 grey
(b)
(c)
(d)
2 yellow: 1 grey
1 yellow: 1 grey
1 yellow: 2 grey.
cross
Yy
x
Yy will be
Yy1
phenotype would
have been
Vestigial-winged
128
64
(b) 96
c) 128
(d) 192
(a)
96
64
0
Mendel formulated the law of purity of gametes
basis of
(a)
monohybrid cross
(b)
dihybrid cross
test cross
(d)
back cross.
on
the
controlled by the
35. ABO blood groups in human beings are
alleles
A, and i. Since
gene I. The gene I has three
there are three different alleles, six different genotypes
possible.
are
How many phenotypes can occur?
(b)
(a) Six
Andalusian fowls have two pure forms- black and white.
If black forms (BB) and white forms (WW) are crossed, F,
individuals appear blue coloured (BW), due to incomplete
dominance. Which of the following would be an outcome
of a cross between black form and blue form?
(a) 1 Black: 2 Blue: 1 White
(b) 2 Black: 1 Blue
() 1 Black: 2 Blue
(d) 1 Black:1 Blue.
31. In mice, black coat colour (allele B) is dominant to brown
coat colour (allele b). The offspring of a cross between a
black mouse (BB) and a brown mouse (bb) were allowed
to interbreed. What percentage of the progeny would have
black coats?
(a) 25%
(c) 75%
number of each
Long-winged
Tt?
Which pair of strains possess the genotype
4
and
2
Strains
(b)
(a) Strains 2 and 3
4
1
and
Strains
(d)
(c) Strains 1 and 3
(29.
had long wings and 91 had vestigial wings.
If an exact Mendelian ratio had been obtained, then the
All triangular
Strain 2 x tt
Strain 3 x tt
flies, long wing is dominant to vestigial wing. When
heterozygous long-winged flies were crossed with vestigialwinged flies, 192 offsprings were produced. Of these, 101
33. In fruit
(b)
(d)
32. Read the given statements and select the correct option.
Statement 1: The law of segregation is one of the most
important contributions to the biology.
Statement 2: It introduced the concept of heredity
factors as discrete physical entities which do not become
blended.
(a) Both statements 1 and 2 are
correct
and statement 2
is the correct explanation of statement 1.
(b) Both statements 1 and 2 are correct but statement 2
is not the correct explanation of statement 1.
()Statement 1 is correct and statement 2 is incorrect.
(d) Both statements 1 and 2 are incorrect.
(d)
Four
36. Read the given statements and select the correct option.
Statement 1: Test cross is used to determine an unknown
genotype within one breeding generation.
Statement 2 Test cross is a cross between F, hybrid and
dominant parent.
(a) Both statements 1 and 2 are correct and statement 2
is the correct explanation of statement 1.
(b) Both statements 1 and 2 are correct but statement 2
is not the correct explanation of statement 1.
(c) Statement 1 is correct and statement 2
(d) Both statements 1 and 2 are incorrect.
is incorrect.
37. What can be the blood group of offspring when both
parents have AB blood group?
(b) A, B and AB
(a) AB only
(c)
50%
100%
Three
Two
A, B, AB and O
(d)
A and B only
38. Phenotypic and genotypic ratio is similar in case of
(a) complete dominance (b) incomplete dominance
(d) epistasis.
(c) over dominance
INHERITANCE OF Two GENESS
pairs of traits are combined in a hybrid,
segregation of one pair of characters is independent of
the other pair of characters". The statement explains which
ofthe following laws/principles of Mendel?
a) Principle of paired factors
39. "When two
(6)
Principle of dominance
(c) Law of segregation
(d) Law of independent assortment
Principles of inheritance and Variation
and
A0.
Match Column-l
ColumnDihybri test
select the correct
the given
45. Refer
()
Column-l
cross
(0) 9:3:3:1
Law of segregation (ii) Dihybrid cross
C. Law of independent (ii)
1:1:1:1
()
D.
ABO blood group
in man
(iv) Purity of gametes
(6i)
(a)
All the
(6)
(v)Multiple allism
(c)
(d)Statements
(ii)
(b) Rry, RRyy, ryy
dihybrid cross
(c)
back cross
42. A man having the
genotype EEFfGgHH can produce
P number of genetically different sperms, and a woman of
genotype liLLMmNn can generate Q number of genetically
(c)
(a) P 4, Q =4
(b)
P = 4, Q = 8
(d)
P
(ii)
(ii)
YR
(b)8
(c)
16
(d) 32
test cross
(d)
monohybrid cross.
produced by
(b)
50%
(d)
12.5%.
yR
Yr
Yr
G
K
yR
H
L
(i) is
AaBb parent
y
R
S
P
M
A plant of
U
type 'H' will
produce seeds
with the
identical to seeds produced by the plants of
(a) Type M
(6) Type
the offsprings in F, generation?
() Type P
Proportion of
genotype
(d) Type N.
49. In maize, coloured
endosperm (C) is dominant
colourless (c); and full endosperm (R) is dominant
shrunken (r). When
Crossed,
it
a
produced
percentage
dihybrid
four
of
F, generation
phenotypes
in the
over
over
was test
following
Coloured full
48% Coloured shrunken 5%
7%
ful
Colourless shrunken 40%
From this data, what will be the
distance
two
8
Colourless
8
(d)
is
the
be explained with
N
yr
44. When a cross is made between a tall plant with yellow
seeds (Tt Yy) and a tall plant with green seeds (Tt y),
what is true regarding the proportions of phenotypes of
Dwarf and Green
can
(ii)
statement
(b)
YR
organism who is heterozygous for 4 loci?
4
statement
true, but
are
(ii) is
(r) seed condition.
8, Q = 8
43 How many types of gametes can be produced by a diploid
(a)
of
the pattern of
The given Punnett's square represents
and round
inheritance in a dihybrid cross where yellow (Y)
and wrinkled
(R) seed condition is dominant over white (y)
48.
different eggs. Determine the values of P and Q.
c)
75%
case
statement
true, but
are
assortment
will be
(a) 25%
(d) Rryy, RRy.
but
are true,
ab gamete
47. The percentage of
CrrYy,rYY
(a)
and
help of
(a)
(a) RrYy, RrYY, RRYy
(6)
and
46. Law of independent
offsprings
represented by the genotype
Proportion of
Tall and Green
(i)
in
true.
are
false.
41. In Mendelian dihybrid cross, when
heterozygous Round
Yellow are self crossed, Round Green
are
8, Q = 4
Statements
F,
progeny
: 1.
() and (ii)
false.
( A-ii), B-(i), C-(iv), D-{0)
(d) A-i), B-(v), C-(ii), D-)
is 3
statements
false.
(a) A-(ii), B-(iv), C-(i), D-(v)
(b) A-), B-Giv), C-(i), D-(v)
P
Mirablls jalapa
Statements
monohybrid
ratio of
by
produced
gametes
different
AABbcc
Phenotypic
option,
25%.
is
Aa
genetically
Types of
a r e 2.
genotype
assortment
individuals
by selfing
correct
individuals
homozygous
of
Percentage
obtained
the
dominant
statements
with
Column-l and
option from the codes given below.
A.
B.
select
between
non-allelic genes?
(a) 48 units
(
7 units
(6) 5 units
(d) 12 units
50
What proportion of the offsprings obtained from cross
AABBCC x AaßbCc will be completely heterozygous for
all the genes segregated independently?
(b) 1/4
(a) 1/8
c
(d)
1/2
NON-ALLELIC INTERACTION
55. Match Column-l with Column-ll and select the correct
option from the codes given below.
A.
51. True-breeding red-eyed Drosophila flies with plain thoraxes
were crossed with pink-eyed flies with striped thoraxes.
Red eye
Pink eye
plain thorax
striped thorax
B.
C.
16
Red eye
Red eye
Pink eye
Pink eye
Plain
Striped
thorax
Plain
thorax
Striped
thorax
thorax
(6) non-homologous chromosomes
(c) X-chromosome
(d) autosomes.
(d) A-(i), B-(), C-(ii)
56. Match Column-l with Column-ll and select the correct
option from the codes given below.
Column-
Column-1
A.
Multiple alleles
0)
Phenylketonuria in
humans
B.
Polygenes
(i)
Blood groups in humans
(multiple genes)
C.
(ii) Skin colour in humans
Pleiotropy
(a) A-i), B-6), C-Gii) (b) A-(), B-(ii), -()
(c)
57. Two
(d)
following will result when plant YyRr is self
present
nearly
on
same
different
phenotype
none of these.
CHROMOsOMAL THEORY
58. Chromosomal
59.
theory
was
given by
(b) Sutton and Boveri
(c)Hugo de Vries
(d) Gregor J. Mendel.
Experimental verification
(c)Henking
60.
INHERITANCE
(a) Morgan et al
(a) Sutton and Boveri
plant
parent?
OF
of inheritance
inheritance was done by
54. Which of the following is correct for the condition when
YyRr is backcrossed with the double recessive
genotypes
genes
(cduplicategens
chromosomes.
(b) 9:3:3:1 ratio of genotypes only
(c) 1:1:1:1 ratio of phenotypes only
(d) 1:1:1:1 ratio of phenotypes and
genotypes
independent
or more
(a) supplementary genes
(b) complementary genes
shape (r). The two genes involved are located on different
a ) 9:3:3:1 ratio of phenotypes only
(d) A-), B-(ii), C-(i)
are called
plant, yellow fruit colour (Y) is dominant to green
fruit colour (y) and round shape (R) is dominant to oval
(a) 9:3:3:1 ratio of phenotypes only
(b) 9:3:3:1 ratio of genotypes only
(c) 1:1:1:1 ratio of phenotypes only
(d) 1:1:1:1ratio of phenotypes and
A-(i), B-(i), C-(i)
chromosomes which determine
certain
pollinated?
(b) A-(i), B-(i), C-()
(a) A-i), B-(ii), C-)
(c) A-), B-(i), C-(ii)
Direction Read the given paragraph to answer the Q. Nos.
53 and 54.
53. Which of the
(ii) Polygenic inheritance
A single gene exhibits
expression
52. Mendel's law of independent assortment does not hold
true for the genes that are located closely on
(a) same chromosome
a
three alleles
A single trait controlled (i) Multiple alleles
multiple phenotypic
92
80
What percentage number of recombinants resulted from
the test cross?
(a) 12
(b) 14
(d) 28
() 16
In
Pleiotropy
three genes
recessive.
The following F, generation resulted from the cross:
L
A single trait controlled (i)
by three or more than
by three or more than
The F, flies were then test crossed against the double
1 212
Column-l
Column-
1/16
Mendel's work
year
(a) 1865
(c) 1910
was
of
"chromosomal theory of
(6) Morgan et al
(d) Karl Correns.
rediscovered by three scientists in the
(b) 1900
(d) 1920
115
Principles of Inheritance and Variation
61.
Which three scientists
work?
(a)
(b)
(c)
(d)
independently rediscovered Mendel's
69. f map
62. What is true about the
crossing over between linked
genes?
a) No crossing over at all.
(b) High percentage of crossing over.
(d)
None of these.
maps
(a) Sutton and Boveri (1902)
(b) Bateson and Punnett (1906)
(c) Morgan (1910)
(b)
between
is 4 units,
P and Q
7 units,
is
R
and
Q
can
be traced as
Q
were
first
prepared by
(d)
70. Given
diagram
shows a
pair of
homologous
chrom0somes
during meiosis.
JA
BTC
TB
upon the distance between any two genes
to the strength of linkage,
TC
Tb
DD
D
C
(b) 0-50%
(d) 100-150%.
65. Read the given statements and select the correct option.
Statement 1:The physical distance between two genes
determines both the strength of linkage and frequency of
Crossing over between two genes
Statement 2 One cross-over reduces the occurrence of
another cross-over in its vicinity.
(a) Both statements 1 and 2 are correct and statement
2 is the correct explanation of statement 1.
(b) Both statements 1 and 2 are correct but statement 2
is not the correct explanation of statement 1.
(c) Statement 1 is correct and statement 2 is incorrect.
Both statements 1 and 2
(a) angstrom
(b)
map unit
(c)
(d)
millimetre.
then which
able to
Law of segregation.
(d) Law of purity of gametes.
71. Match Column-I with Column-ll and select the correct
option from the codes given beloOw.
Column-
Column-1
A.
Multiple allelism
() Tt x t
B.
Back cross
C.
D.
Test cross
Crossing over
(i) Ttx TT
(ii) Human blood groups
(iv) Non-parental gene
E.
Recombination
(v) Non-sister chromatids
combination
linkage was known at the time of Mendel
been
of the following laws, he would not have
explain?
(a)Law of dominance.
(6) Law of independent assortment.
67. f
Maximum crossing over will occur between genes
(b) Cand d, c and D
(a) A and a, D and d
(d) A and d, a and D
c) B and c, b and C
are incorrect.
66. The distance between the genes is measured by
Dobson unit
AaBB
x
P
cross overs will vary from
(d)
genes
between
inversely proportional
(a) 50-100%
(c) 75-100%
aabb
follows.
(d) Sturtevant (1911).
which is
between
on
R
63, Chromosome maps/ genetic
64) Depending
AAbb
(d)
Aaßb
experiment
for
AABB x
(b)
aaBB
distance
suitable
units, and
P and R is 11
linkage map
on the
the order of genes
LINKAGE AND RECOMBINATION
Hardly any crossing over.
of the
linkage?
(a) aaBB x
(c) AaBb x
Avery. McLeod, McCarty
Sutton, Morgan and Bridges
Bateson, Punnet and Bridges
de Vries, Correns and
Tschermak
(c)
68) Which
is
following
(a) A-(ii), B-), C-i), D-(V), E-(iv)
(b) A-ii), B-(i), C-6), D-(), E-(iv)
() A-(ii), B-6i), C-), D-(v), E-()
(d) A-(iv), B-(i), C-(i), D-(0), E-(ii)
72. Genes located very close to one
another on same
chromosome tend to be transmitted
together and are
called as
(a) allelomorphs
(c) linked genes
(b) identical genes
(d) recessive genes.
(80
SEX DETERMINATION
73. Match Column-l with Column-ll and select the correct
option from the codes given below.
Column-Il
ColumnA.
Gregor J. Mendel
()
Chromosomal theory of
B.
C.
Sutton and Boveri
(i)
Henking
(ii) Drosophila
inheritance
Laws of inheritance
D
(iv) Discovered X-body
Morgan
(a) A-(i), B-), C-(iv), D-(i)
(c) Diploid
()A-(iv), B-(i), C-6), D-(i)
(d) Haploid
23
32
16
sex
(d) both (b) and (c).
(b) birds and reptiles
(c) butterfilies and moths
(d) honey bees, ants and wasps.
MUTATION
in which the males have
(a) one X chromosome (6) one Y chromosome
(c) two X chromosomes (d) no X-chromosome.
determination
(a) females produce two different types of gametes
(b) males produce two different types of gametes
() females produce gametes with Y chromosome
(d) males produce gametes with Y chromosome.
sex
77. Which of the following is incorrect
of sex determination?
regarding
ZW-ZZ type
(a)
t occurs in birds and some
(6)
Females are homogametic and males are
reptiles.
heterogametic.
1:1sex ratio is
(d)
All of these.
produced
in the
78. A couple has six daughters. What is the
having a girl next time?
(a) 10%
(b) 50%
(c)
(d)
90%
offsprings.
possibility of their
100%
(i) Males (drones) develop parthenogenetically from
unfertilized eggs.
(ii) Queen bee feeds upon royal jelly and the worker b
feed upon bee bread.
(a) ) and (ii)
(b) (i) and (ii)
(d)
83. More than two alternate forms of a gene present on the
same locus are called ().
They are produced due to
repeated i)_ of the same gene but in different directions.
Their well known example is
Which of the folowing
statement?
(0, (i) and (ii)
ii.
correctly
fills the above
(i)
(ii)
(ii)
(a) Epistatic genes crossing over polydactyly
(b) Multiple alleles mutations
human blood groups
c)Supplementary mutations
hypertrichosis
genes
(d) Linked genes
crossing over alkaptonuria
84. Rate of mutation is affected
79. Select the correct statements regarding honey bees.
(i) The queen bee and the worker bees develop from
fertilized eggs and are sexually females.
(C)()and (ii)
46
16
32
(a) grasshoppers and cockroaches
Grasshopper is an example of XO type of sex determination
()
Diploid
Haploid
Diploid
82. Haplodiploidy is found in
74. XO type of sex determination and XY
type of
determination are the examples of
(a) male heterogamety (b) female heterogamety
76. In XO type of
human
honey bees, females are
having (i)_chromosomes
and males are (i) having _(iv) chromosomes.
(i)
(i)
(ii)iv)
46
(a) Diploid
Haploid 23
(b) A-(iv), B-(i), C-(i), D-(i)
(cmale homogamety
a
81. In
(b) Haploid
(d) A-(i), B-(i), C-(iv), D-(i)
75.
Number of autosomes present in liver cells of
female is
(a) 22 autosomes
(b) 22 pairs
(c) 23 autosomes
(d) 23 pairs.
(a) temperature
(c) gamma rays
by
(b) X-rays
(d) all of these.
DEnIGREE aRIAIVCIc
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