2 English

SUBJECT : BOTANY
Topic : Principle of Inheritance and variation
1. A man whose father was colorblind marries a 6. … ...A … .... genes are those which occurs on the
woman, who had a colorblind mother and normal same chromosome and … ...B … ... genes are
father. What percentage of male children of this those, which are present on different
couple will be colorblind ? chromosome. Choose correct choice for A and
(1) 25% (2) 0% B.
(3) 50% (4) 75% (1) A-linked; B-unlinked gene
2. Haemophilia is more commonly seen in human (2) A-unlinked; B-linked
males than in females because (3) A-identical; B-non-identical
(1) This disease is due to a Y linked recessive (4) A-non-identical; B-identical
mutation
(2) This disease is due to an X linked recessive
7. Two genes A & B present on same chromosome
show 40% crossing over, then what will be the
mutation percentage of gamete (aB) for the plant having
(3) This disease is due to an X-linked dominant genotype AaBb in cis arrangement ?
mutation (1) 40% (2) 80%
(4) A greater proportion of girls die in infancy (3) 20% (4) 10%
3. Linkage gene do not shows 8. If a colourblind female marries a normal male
(1) independent assortment
(XY) then :-
(2) 9 : 3 : 3 : 1
(1) All the sons are normal
(3) crossing over
(2) All the sons are colourblind
(4) all of the above
(3) All the daughter are colourblind
4. Frequency of crossing over is ...A... in linked
(4) Both sons and daughters are colourblind
gene and ...B... in unlinked gene. Choose correct
combination for A and B. 9. What will be the percentage inheritance of a
(1) A-more; B-less disorder from an X-linked diseased father to his
(2) A-less; B-more son.

(3) A-same; B-same (1) 0% (2) 25%

(4) A-same; B- less (3) 50% (4) 100%

5. The important things to remember are that 10. Red eyed female Drosophila is crossed with
chromosomes as well as genes occur in ...A... . white eyed male. If this cross results in 50%
progeny being red eyed, we can say that
The two alleles of a gene pair are located on
homologous sites on ...B... chromosomes. (1) Both parents were hemizygous
Choose the correct choice for A and B. (2) Female parent was heterozygous
(1) A-single, B-analogous
(3) Female parent was pure
(2) A-pair, B-analogous
(4) Both parents were pure
(3) A-pair, B-homologous
(4) A-single, B-heterozygous
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11. What percentage of progenies when there is 16. Albinism is inherited as
marriage between colourblind father's son and (1) Autosomal recessive trait
colourblind mother's daughter -
(2) Autosomal dominant trait
(1) 50% sons colour blind
(3) X-linked recessive trait
(2) 50% daughters carriers
(4) X-linked dominant trait
(3) 50% daughters normal
(4) All of these
17. X-linked recessive disease shows
the transmission from male to-
12. Which of the following is correct ? (1) Male progeny
(1) When genes are grouped on the same (2) Female progeny
chromosome, some genes are very tightly
linked and showed very low recombination (3) Both male and female progeny in equal
proportion
(2) When genes are loosely linked show very
low recombination (4) Both male and female progeny in unequal
proportion
(3) When genes are tightly linked show higher
recombination 18. In the listed Mendelian disorders, how many
concerned with defective haemoglobin?
(4) When genes are loosely linked show no Haemophilia, Cystic fibrosis, sickle-cell anemia,
recombination Phenylketonuria, Colour-blindness
13. Baldness is an (1) Two (2) One
(1) Sex limited character
(3) Three (4) Four
(2) Sex influenced character
(3) Sex linked character
19. Select the incorrect match.
(1) Phenylketonuria - Mental retardation
(4) Holandric character
(2) Turner's syndrome - Reduced number of
14. Number of barr bodies present in turner’s chromosome
syndrome is/are
(3) Klinefelter's syndrome - Sterile females
(1) Two (2) Three
(4) Down's syndrome - Small round head and
(3) One (4) Zero
furrowed tongue
15. Read the following features and identify the
20. a'-Thalassemia is controlled by____(i)____ gene
genetic disorder
present on ____(ii)____ chromosome
a. Short statured with small round head
b. Big and wrinkled tongue. (1) (i) HBA1 and HBA2, (ii) 16
c. Congenital heart disease. (2) (i) HBB (ii) 11
d. Retarded physical, psychomotor and mental
development. (3) (i) HBB (ii) 16
e. Broad palm and characteristic palm crease. (4) (i) HBB and HBA2 (ii) 11
(1) Klinefelter's syndrome
(2) Down's syndrome
(3) Turner's syndrome
(4) Both (2) & (3)
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21. In Drosophila four genes shows A-B-C-D 26. In Morgan's experiment, what will be percentage
arrangement & they show following COV in of recombination in case of body colour and eye
crosses : colour gene in Drosophila?
A & B → 2.8% (1) 37.2%
A & C → 7.8%
D & B → 8.0% (2) 1.3%
D & C → 3.0% (3) 98.7%
What will be the distance between genes B & C ?
(4) 27.3%
(1) 3.8 cM
27. What will be the percentage inheritance of a
(2) 3 cM disorder from an X-linked diseased father to his
(3) 5.0 cM son ?
(4) Can not be determind (1) 0% (2) 25%
22. Haemophilia – B – is due to absence of :- (3) 50% (4) 100%
(1) Factor – VIII (2) Factor – IX 28. Which of the following characters given for
Drosophila are wrong ?
(3) Factor – XI (4) Factor – VI (a) They could be grown on simple medium in
23. An autosomal character is present in both sexes, laboratory
(b) They complete their life cycle in about 2-
but showing expression in one sex only, due to
hormones, then such type of character is known weeks
as :- (c) Single mating produces few number of
progeny flies.
(1) Sex linked (d) They have many types of hereditary
(2) Sex influenced character variations that can be seen with low power
microscope.
(3) Sex limited character
(e) Male & Female flies are not easily
(4) All distinguishable
24. In a cross in Drosophila, the heterozygous (1) a, b, c
member with grey body (b+) and long wings (2) a, b, c, d, e
(vg+)was crossed with black body and vestigial
wings, the progeny had the following ratio ; grey (3) d and e
vestigial - 24 ; grey long - 126 ; Black long-26, (4) c and e
Black vestigial - 124. What is the frequency of
recombinant in the population ? 29. Given below is the chromosome composition of
a Drosophila, on the basis of Genic balance
(1) 15.8 % (2) 16.7 % theory, the sex of this fly would be:
(3) 17.5 % (4) 14.5 % 3A + XY
25. Female heterogamety can be seen in (1) Super female
(1) Human beings (2) Drosophilla (2) Super male
(3) Fowls (4) Honey bees (3) Intersex
(4) Fertile male

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30. The experiment shown in the figure has been 31. Given below is, the figure of Drosophila
carried out by Morgan to show the phenomenon melanogaster.
of linkage & recombination. If in Cross I, genes
are tightly linked and in Cross II, genes are
loosely linked then what will be percentage of
recombinants produced in Cross I and Cross II
respectively in F2 gene ration ?

If was found to be very suitable for experimental

verification of chromosomal theory of
inheritance by Morgan, because.
(1) A single mating produces two young flies
(2) Smaller female is easily recognisable from
larger male
(3) It completes life cycle in about two weeks
(4) It reproduces parthenogenetically
32. The cross over frequency between the genes A &
B, A & C and B & C is 6 %, 15 % and 21 %
respectively. What is the possible sequence of
genes on chromosome ?
(1) A-B-C
(2) B-A-C
(3) A-C-B
(4) Either B-A-C or C-A-B
33. Mice having yellow body colour is crossed with
brown colour one. What percentage of progeny
show lethality ?
(1) 25% (2) 75%
(3) 0% (4) 100%
34. Two linked genes a and b show 40%
recombination. The individuals of a dihybrid
cross between ++/++ and ab/ab shall produce
gametes as
(1) 98.7% and 62.8%
(1) + + 80 : ab 20
(2) 1.3% and 37.2%
(2) + + 50 : ab 50
(3) 37.2 and 1.3%
(3) + + 40 : ab 40 : + a 10 : + b 10
(4) 62.8% and 98.7%
(4) + + 30 : ab 30 : + a 20 : + b 20

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35. Holandric genes are present on :- 39. Observe the sex determination in the following
(1) Y-chromosome columns.
(2) Non homologous region of Y-chromosome
(3) Homologous region of Y chromosome
(4) Non homologous region of both X and Y
chromosome
36. All given statements are correct w.r.t. sex-linked
inheritance, except:
(1) Male will immediately express a X-linked Which of the following combination is correct?
trait, whether it is dominant or recessive
(1) A-2, 4; B-1; C-2
(2) X-chromosome of male parent will inherit
to daughters only, in F1 generation (2) A-3, 4; B-2; C-1
(3) X-chromosome of female parent will (3) A-2, 4; B-1; C-3
inherit to daughters in F2 generation only (4) A-1, 3, 4; B-2; C-5
(4) Female will not express a X-linked 40. Both husband and wife have normal vision
recessive trait in heterozygous condition though their fathers were colour blind. The
37. In Drosophila homozygous red eyed female was probability of their daughter becoming colour
mated with white eyed male; a daughter from F1 blind is
generation mated with white-eyed male. The (1) 0% (2) 25%
progeny of this second mating will be :
(3) 50% (4) 75%
(1) all males and females have red eyes
41. Albinism is known to be due to an autosomal
(2) all males and females have white eyes recessive mutation. The first child of a
(3) all males have red eyes; all females have couple with normal skin pigmentation was an
white eyes albino. What is the probability that their second
child will also be an albino?
(4) males and females have red eyes and white
eyes in the ratio 1 : 1 (1) 50% (2) 75%
38. Identify the correct match (3) 100% (4) 25%
(1) CML – Translocation involving 42. A colour blind girl is rare because she will be
chromosome-22 born only when
(2) Patau’s syndrome – Trisomy of 18th (1) Her mother and maternal grand father were
chromosome colour blind
(3) Phenylketonuria – Dominant gibberish (2) Her father and maternal grand father
were colour blind
mutation
(3) Her mother is colour blind and father
(4) Muscular Dystrophy – Dominant
has normal vision
autosomal gene mutation
(4) Parents have normal vision but grand
parents were colour blind.

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43. Which of the following show linkage group in 48. German botanist who examined large number of
coupling phase? plants and observed that all plants are composed
(1) (2) of different kind of cells which form the tissue in
the plants:-
(1) Schwann
(3) (4) (2) Matthias schleiden
(3) Rudolf virchow
44. Of a normal couple, half the sons are (4) Antonvon Leeuwenhoek
haemophilic while half the daughters are 49. A woman has a haemophilic son and three
carriers. The gene is located on normal children. What is the genotype of woman
(1) X-chromosome of father and her husband:
(2) Y-chromosome of father (1) XX and XhY (2) XhXh and XhY
(3) One X-chromosome of mother (3) XhXh and XY (4) XhX and XY
(4) Both the X-chromosomes of mother 50. Which of the following is a recombinant type of
progeny obtained by Morgan while carrying out
45. Which of the following is true for the location of dihybrid cross in Drosophila for body colour and
few genes of Drosophila studied by T.H. Morgan : eye colour?
(1) y, w and m genes are located on Y (1)
chromosome
(2) y+, w+ and m+ genes are located on Y
chromosome
(3) y, y+, w, w+, m and m+ genes are located on (2)
X-chromosome
(4) y, y+, w, w+, m and m+ genes are autosomal
46. 8 types of gametes are produced by following (3)
genotype :-
(1) AAbbCC (2) AaBbCc
(3) AABbcc (4) AabbCC
47. If map distance between genes P and Q is 4 (4)
units, between P and R is 11 units, and between
Q and R is 7 units, the order of genes on the
linkage map can be traced as follows
(1)

(2)

(3)

(4)

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