Download MULTIPLE CHOICE QUESTIONS For CET EXAMINATIONS

MULTIPLE CHOICE QUESTIONS
For C.E.T. EXAMINATIONS 2011
BY
Dr. M.J.SUNDAR RAM
SURANA IND. PU COLLEGE, BANGALORE
1. During gamete formation in Mendel’s expts:
1. Gametes carry the same no. of alleles as the
parents & both alleles of a pair enter the same
gamete.
2. Gametes carry half the no. of alleles as the
parents & the 2 alleles of a pair cannot enter
the same gamete.
3. Gametes carry half the no. of alleles as the
parents & both alleles of a pair enter the same
gamete.
4. Gametes carry the same no. of alleles as the
parents & the 2 alleles of a pair cannot enter
the same gamete.
2. Column A shows the genotypes of pea plants
and column B shows the type of cross in Mendel’s
expt. Match the 2 and choose the correct answer:
GENOTYPE
TYPE OF CROSS
1. TT X tt
p. Test cross
2. Tt X Tt
q. Reciprocal cross
3. Tt X tt
r. Parental cross
4. TT (male) X tt female) s. Cross between F1 plants
TT (female) X tt male)
1.
2.
3.
4.
1-p, 2-q, 3-r, 4-s
1-q, 2-r, 3-s, 4-p
1-r, 2-s, 3-p, 4-q
1-r, 2-q, 3-p, 4-s
3. When Mendel crossed a plant producing yellow
round seeds with a plant producing green
wrinkled seeds, he obtained both parental combinations and recombinations in the F2 generation.
The ratio between parental combinations &
recombinations was:
1.
2.
3.
4.
9:3:3:1
10:6
3:1
15:1

4. If a gene on the X chromosome does not
have a corresponding allele on the Y
chromosome, this condition is known as:

1. heterozygous condition
2. holozygous condition
3. hemizygous condition
4. homozygous condition



5. In pea plants yellow colour of seeds is
dominant over green and round shape dominant
over wrinkled. A plant producing yellow round
seeds is crossed with a plant producing green
wrinkled seeds. F1 generation consists of yellow
round, yellow wrinkled, green round and green
wrinkled in the ratio of 1:1:1:1. Hence the
genotype of the yellow round parent is:
1) YYRR
2) YyRR
3) YYRr
4) YyRr
6. Column 1 contains contributions and column 2
the names of scientists. Match them and choose
the correct answer:
1. scientist’s contribution
1. ABO blood groups
2. Sex linkage
3. Principles of heredity
2. Name of scientist
a. Mendel
b. Correns
c. Morgan
4. Rediscovery of Mendel’s work d. Landsteiner
1.
2.
3.
4.
1-a, 2-b, 3-c, 4-d
1-a, 2-d, 3-c, 4-b
1-d, 2-c, 3-a, 4-b
1-c, 2-a, 3-b, 4-d
7. A gene on the Y chromosome without a
corresponding allele on the X chromosome is
inherited from father to son. This condition is
referred to as:
1.
2.
3.
4.
Holozoic condition
Holandric condition
Hologynous condition
Homozygous condition
8. When the homologous chromosomes during
Anaphase I of Meiosis fail to separate and move
to the same pole it is said to be:
1.
2.
3.
4.
Disjunction
Dislocation
Non-disjunction
Translocation
9. Which of the following statements is true:
1. If you are A positive you can donate blood to A
positive, AB positive, A negative, AB negative persons.
2. If you are AB positive you can receive blood from A
positive, A negative, B positive, B negative, AB
positive, AB negative, O positive, O negative persons.
3. If you are O positive you can donate blood to A
positive, A negative, B positive, B negative, AB
positive, AB negative, O positive and O negative
persons.
4. If you are B negative you can receive blood from B
positive, B negative, O positive, O negative persons.
10. Column 1 gives the blood-antiserum reactions
& column 2 gives the blood group of the blood
tested. Match the two & choose the right answer:
1. Blood-antiserum reaction
2. Blood group
1. Blood clots in A & B antisera
a. A group
2. Blood clots in A but not in B antiserum b. AB group
3. Blood clots in B but not in A antiserum c. O group
4. Blood does not clot in either antisera
1)
2)
3)
4)
1-a, 2-b, 3-c, 4-d
1-b, 2-a, 3-d, 4-c
1-c, 2-d, 3-a, 4-b
1-d, 2-c, 3-b, 4-a
d. B group
11. According to Landsteiner:
1. If the agglutinogen is present in the RBC, the
corresponding agglutinin must be absent in
the plasma.
2. If the agglutinogen is present in the RBC, the
corresponding agglutinin must also be present
in the plasma.
3. If an agglutinogen is absent in the RBC, the
corresponding agglutinin must also be absent
in the plasma.
4. If an agglutinogen is absent in the plasma, the
corresponding agglutinin must be present in
the RBC.
12. If a couple have 4 children, each belonging to
blood groups A, B, AB and O, then the genotypes
of the couple are:
1.
2.
3.
4.
Homozygous for A and homozygous for B
Homozygous for A and heterozygous for B
Heterozygous for A and heterozygous for B
Heterozygous for A and homozygous for B
13. The blood group of a person is determined by
mixing his blood with serum. Serum means:
1.
2.
3.
4.
Plasma
Plasma
Plasma
Plasma
containing only platelets.
that is separated from clotted blood.
devoid of formed elements
containing only white blood cells.
14. One of the following scientists was not
responsible for rediscovery of Mendel’s work:
1.
2.
3.
4.
Morgan
Tschermak
Hugo De Vries
Correns
15. Which of the following is an example of
holandric inheritance:
1.
2.
3.
4.
Colourblindness
Sickle cell anemia
Hypertrichosis
Hemophilia
16. The figure below displays the karyotype of a
person suffering from a genetic disorder. Identify
the disorder:
1)
2)
3)
4)
Down’s syndrome
Klinefelter’s syndrome
Turner’s syndrome
Cri du chat syndrome
17. Column 1 contains terms and column 2
contains their definitions. Match them and choose
the right answer:
1. Term
1. Phenotype
2. definition
a. Organism possessing 2 different alleles
2. Heterozygous b. A trait which expresses itelf in F1
3. Serum
c. Appearance of an organism
4. Recessive
d. Plasma without clotting proteins
1.
2.
3.
4.
e. A trait which cannot express itself
1-a, 2-b, 3-c, 4-d
1-b, 2-c, 3-d, 4-a
1-c, 2-a, 3-d, 4-e
1-d, 2-a, 3-b, 4-c
18. In 4 O’clock plant Mirabilis jalapa, pink
flower-producing plants were produced when:
1.
2.
3.
4.
2 red flowered plants were crossed
a pink flowered plant was crossed with a white
flowered plant
two white flowered plants were crossed
a red flowered plant was crossed with a white
flowered plant
19. The phenotypic ratio in a monohybrid cross
showing incomplete dominance is:
1.
2.
3.
4.
9:3:3:1
1:2:1
3:1
1:2:1:2:4:2:1:2:1
20. A test cross means:
1.
2.
3.
4.
The F1 organism is allowed to self pollinate.
The F1 organism is crossed back to the
dominant parent.
The homozygous dominant parent is crossed
with the recessive parent.
The F1 organism is crossed back to the
recessive parent.
21. Hemophilia is a sex-linked hereditary
disorder which is characterised by:
1.
2.
3.
4.
Absence of RBCs in the blood
The clotting mechanism is defective
Too many white blood cells in the blood
Low count of platelets
22. A pea plant producing yellow round seeds is
crossed with a green wrinkled plant (yyrr). Two
types of offspring are produced – those producing yellow round seeds & those producing yellow
wrinkled seeds in the ratio of 1:1. The genotype
of the yellow round plant is:
1. YYRR
2. YYRr
3. YyRR
4. YyRr
23. In which of the following situations there is
risk of the child contracting erythroblastosis
foetalis:
1.
2.
3.
4.
Mother
Mother
Mother
Mother
Rh
Rh
Rh
Rh
positive & foetus Rh positive
positive & foetus Rh negative
negative and foetus Rh positive
negative & foetus Rh negative
24. A child which is afflicted with one of the
following disorders cries like a cat:
1.
2.
3.
4.
Hemophilia
Cri du chat syndrome
Sickle cell anaemia
Turner’s syndrome
25. Column 1 contains chromosomal disorders
and 2 their chromosomal peculiarity. Match them
correctly & choose the correct answer:
1. DISORDER
1. Turner’s syndrome
a. 45A + XX/XY = 47 chromosomes
2. Klinefelter’s syndrome
b. 44A + XO = 45 chromosomes
3. Down’s syndrome
c. 44A + XXY = 47 chromosomes
4. Cri du chat syndrome
d. 44A + XX/XY = 46 chromosomes
--
1.
2.
3.
4.
2. CHROMOSOMAL PECULIARITY
e. 44A + XX/XY = 46; deletion of short arm
of 5th chromosome
1-b, 2-c, 3-a, 4-e
1-a, 2-b, 3-c, 4-d
1-e, 2-a, 3-d, 4-b
1-d, 2-e, 3-c, 4-b
26. Erythroblastosis foetalis is a blood disorder
in which:
1.
2.
3.
4.
The mother’s blood stops circulation into the
foetus, leading to its death.
The child’s blood develops anti Rh antibodies
and destroys the RBCs of the mother.
Mother’s blood enters the foetal circulation,
agglutinating the RBCs, leading to its death.
The child’s blood enters mother’s circulation
and destroys her RBCs, leading to jaundice.
27. A reciprocal cross means:
1. F1 organism is back crossed to dominant
parent
2. F1 organism is back crossed to recessive
parent
3. cross between two homozygous organisms
4. interchanging sexes of 2 parents and
crossing
28. Antibodies are carried in:
1.
2.
3.
4.
The plasma
white blood cell
red blood corpuscle
platelet
29. In some females one of the X chromosomes
disintegrates and they possess 44 autosomes and
only one X chromosome. This disorder is known
as:
1.
2.
3.
4.
Cri du chat syndrome
Turner’s syndrome
Down’s syndrome
Klinefelter’s syndrome
30. This allosomal disorder is exclusively found
in males:
1.
2.
3.
4.
Cri du chat syndrome
Klinefelter’s syndrome
Down’s syndrome
Turner’s syndrome
31. In sickle cell anaemia the abnormal hemoglobin is called:
1.
2.
3.
4.
Hemocyanin
Hemoglobin A
Hemoglobin S
Hemoerythrin
32. According to Mendel, in a cross involving a
pair of alleles,
1.
2.
3.
4.
both alleles blend & express together in the F1
generation.
Both alleles come and stay together but do not
blend.
Any one allele enters the F1 organism.
Both alleles disappear in the F1 generation.
33. More men suffer from colourblindness than
women because:
1.
2.
3.
4.
Women are more resistant than men
Men are hemizygous & one defective gene is
enough for them to suffer
Male hormones are responsible for colourblindness
The disease is Y-linked and is transmitted
only among males
34. This is not a valid reason for Mendel to select
pea plants for his experiments:
1.
2.
3.
4.
The flowers of pea plants are unisexual.
Pea plants possess contrasting traits.
Cross pollination by insects is impossible.
Life span of pea plants is reasonably short.
35. The appearance of an organism is known as:
1.
2.
3.
4.
Phenocopy
Genotype
Replication
Phenotype
36. If reciprocal crosses do not yield identical
results it means that:
1.
2.
3.
4.
There is incomplete dominance
Traits are not influenced by sex
There is no segregation of traits
The traits are sex-linked
37. With the knowledge of ABO blood groups it is
not possible to:
1.
2.
3.
4.
Make safe and success blood transfusions.
Assign a child to its rightful parents.
Determine the husband of an estranged wife.
Solve cases of disputed paternity.
38. The law of purity of gametes states that:
1.
2.
3.
4.
The
The
The
The
gamete is pure for both alleles.
parents are pure for a particular allele.
F1 offspring are pure for both alleles.
gamete is pure for a particular allele.
39. If the grandfather is colourblind, the
grandson becomes colourblind. But the daughter
is normal. This type of inheritance is said to be:
1.
2.
3.
4.
criss-cross inheritance
Holandric inheritance
Incomplete inheritance
Autosomal inheritance

40. Alleles are:

1. a
2. a
3. a
4. a



pair
pair
pair
pair
of similar traits
of dominant traits
of recessive traits
of contrasting traits
41. Down’s syndrome is an example of:
1.
2.
3.
4.
Autosomal disorder in man
Gene disorder in man
Allosomal disorder in man
Allelic disorder in man

42. Genotype means:

1. the genetic constitution of an organism
2. the appearance of an organism
3. the gametes produced by male parent
4. the gametes received by female parent




43. A cross involving two pairs of alleles is
known as:

1. test cross
2. back cross
3. dihybrid cross
4. Monohybrid cross




44. Mendel was lucky in selecting pea plants
for his experiments because:

1. Natural cross pollination of flowers
impossible.
2. Pea plants possess contrasting traits.
3. Pea plants have 7 pairs of chromosomes
and each chromosome carries one trait.
4. It is very easy to cultivate and grow pea
plants.




45. Which one of the following points played a
crucial role in Mendel’s success:

1. Mendel had a thorough knowledge of
Mathematics and Statistics.
2. Mendel was working as a monk in a church.
3. Mendel had no knowledge of genes or
chromosomes.
4. Mendel used to take special care in
cultivating pea plants.



46. Column 1 contains the names of organisms
and column 2 contains the concepts they reveal.
Match the two and select the correct answer:
1. Organisms
1.
2.
3.
4.
2. concepts
1. Mirabilis jalapa
p. Sex linkage
2. Drosophila melanogaster
q. Rh factor
3. Pisum sativum
r. Incomplete dominance
4. Macaca rhesus
s. Principles of heredity
1-r, 2-p, 3-s, 4-q
1-p, 2-q, 3-r, 4-s
1-s, 2-r, 3-q, 4-p
1-q, 2-s, 3-p, 4-r
47. Column 1 contains disorders and column 2
contains the reason for the same. Match the two
and select the correct answer given:
1. Disorder
1.
2.
3.
4.
2. Reason
1. Sickle cell anaemia
p. Sex-linked hereditary disorder
2. Down’s syndrome
q. One X chromosome is missing
3. Haemophilia
r. One autosome is found in triplicate
4. Turner’s syndrome
s. A defective gene produces abnormal RBCs
1-s, 2-r, 3-q, 4-p
1-p, 2-q, 3-s, 4-r
1-s, 2-r, 3-p, 4-q
1-r, 2-p, 3-q, 4-s
48. A pea plant producing yellow round seeds is crossed
with a plant which produces green wrinkled seeds (yyrr).
The ratios of offspring produced are mentioned column 1
and the genotype of the dominant parent in column 2.
Match the 2 and select the correct answer:
1. Ratios of offspring
1.
2.
3.
4.
2. Genotype of dominant parent
1. Only yellow round offspring
p. YyRR
2. Yellow round : yellow wrinkled (1:1)
q. YyRr
3. Yellow round : green round (1:1)
r. YYRR
4. Yellow round : Yellow wrinkled : Green
round : green wrinkled (1:1:1:1)
s. YYRr
1-s, 2-r, 3-q,4-p
1-p, 2-q, 3-r, 4-s
1-r, 2-s, 3-p, 4-q
1-q, 2-p, 3-s, 4-r
49. A test cross is conducted:
1.
2.
3.
4.
as a rapid method of purifying the stocks.
to know whether a trait assorts independently or not.
to determine the genotype of an organism.
To know whether a trait dominates over its
allele or not.
50. Which of the following statements of Mendel
is universally true:
1.
2.
3.
4.
In a cross involving a pair of alleles one of
them dominates over the other.
Reciprocal crosses yield identical results.
In a cross involving a pair of alleles, both
alleles come and stay together in F1 but do
not blend.
Every trait has two alternatives or alleles.