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YAKEEN- 1.0
Principle of inheritance and variations
1.
A family of five daughters only is expecting sixth
child. The chance of its beings a son is
(A) Zero
(B) 25%
(C) 50%
(D) 100%
2.
A correct dihybrid condition is(A) tr Rr
(B) Tr rr
(C) tt rr
(D) Tr Rr
3.
4.
DPP-03
8.
In a plant, red fruit (R) is dominant over yellow fruit
(r) and tallness (T) is dominant over shortness (t). If
a plant with RRTt genotype is crossed with a plant
that is rrtt,
(A) 25% will be tall with red fruit
(B) 50% will be tall with red fruit
(C) 75% will be tall with red fruit
(D) All of the offspring will tall with red fruit
In a cross between AaBb x aabb, the ratio of f2
genotypes between AaBb, aaBb, Aabb, and aaBb
would be
(A) 9:3:3:1
(B) 2:1:1:2
(C) 1:1:1:1
(D) 7:5:3:1
9.
In order to find out the different types gametes
produced by a pea plant having the genotype AaBb
, it should be crossed to a plant with the genotype
(A) aaBB
(B) AaBb
(C) AABB
(D) aabb
A cross between pure tall pea plant with green pods
and dwarf pea plant with yellow pods will produce
...........number of dwarf plants in F2 out of 16
(A) 9
(B) 3
(C) 4
(D) 1
10.
How many different kind of gametes will be
produced by a plant having the genotype AABbCC?
(A) Three
(B) Four
(C) Nine
(D) Two
11.
In Mendal’s experiments with garden pea, round
seed shape (RR) was dominant over wrinkled seeds
(rr), yellow cotyledon (YY) was dominant over
green cotyledon (yy), what are the expected
phenotypes in the f2 generation of the cross RRYY
x rryy?
(A) only round seeds with green cotyledons
(B) only wrinkled seeds with yellow cotyledons
(C) only wrinkled seeds with green cotyledons
(D) round seed with yellow cotyledons and
wrinkled seeds with yellow cotyledons
12.
In pea plants yellow seed are dominant to green. If
a heterozygous yellow seeded plant is crossed with
a green seeded plant, what ratio of yellow and green
seeded plants would you expect in F1 generation ?
(A) 50:50
(B) 9:1
(C) 1:3
(D) 3:1
13.
The offspring of AAbbxaaBB is crossed with aabb
The genotypic ratio of progeny will be
(A) 9:3:3:1
(B) 1:2:1
(C) 1:1:1:1
(D) 4:1
5.
In dihybrid cross between AABB x aabb, In f2
generation progeny with genotype AABB, AABb,
Aabb and AaBb occurs In the ratio of-:
(A) 1:1:1:1
(B) 9:3:3:1
(C) 1:2:2:1
(D) 1:2:2:4
6.
Hybridization between Tt x tt gives rise to the
progeny of ratio-:
(A) 1:1
(B) 1:2:1
(C) 1:2
(D) 4:1
7.
In a given plant, red colour (R) of fruit is dominant
over white fruit (r): and tallness (T) is dominant
over dwarfness (t). If a plant with genotype RRTt is
crossed with a plant of genotype rrtt, what will be
the percentage of tall plants with red fruits in the
next generation ?
(A) 100%
(B) 25%
(C) 50%
(D) 75%
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22.
Heterozygous tall (Tt) is crossed with homozygous
tall (TT) . percentage of heterozygous tall in the
progeny would be
(A) 25%
(B) 50%
(C) 75%
(D) 100%
14.
Selfing of hybrid yellow round seeded pea plants ,
the phenotypes of next generation would be
(A) 15:1
(B) 9:7
(C) 12:3:1
(D) 9:3:3:1
15.
Number of genotypes produced when individuals of
genotype ‘YyRrTt’ are crossed with each other(A) 4
(B) 45
(C) 28
(D) 27
23.
Eight gamete types formed by AaBbCc
individual/heterozygous for how many gene loci is
(A) 2
(B) 4
(C) 3
(D) 16
16.
Mendal’s law of segregation is applicable to
(A) Dihybrid cross only
(B) Both dihybrid and monohybrid crosses
(C) Monohybrid cross only
(D) Dihybrid but not monohybrid cross
24.
How many types of gametes will be produced by
individuals of AABbcc genotypes if two genes A
and B are linked
(A) Two
(B) Four
(C) Six
(D) Two
17.
Tall plants with round seeds (TTRR) is crossed
with dwarf plants having wrinkled seed (ttrr) F1
plants are tall with rounded seeds than types of
gemetes produced by F1 would be
(A) One
(B) Two
(C) Three
(D) Four
25.
AaBbCc genotype form 4 type of different gamete
this means –
(A) two genes are linked
(B) all three linked
(C) always form 8 gametes
(D) no linkage occur
18.
A plants of genotypes AABbCC is selfed .
Phenotypic ratio of f2 generation would be
(A) 1:1
(B) 9:3:3:1
(C) 3:1
(D)27:9:9:9:3:3:3:1
26.
A brown eyed couple has a blue eyed child , the
trait of brown eye (B) is dominant over blue eye (b)
, what is genotype of the couple
(A) Bb x Bb
(B) BB x BB
(C) BB x Bb
(D) BB x bb
19.
Alleles are
(A) Alternete forms of a gene
(B) Pairs of sex chorosomes
(C) homologous chromosomes
(D) none of the above
27.
Dihybrid cross is related to
(A) Principle of dominance
(B) Principle of independent assortment
(C) Principle of segregation
(D) Both (B) and (C) possible
28.
AaBbCc genotype individual show linkage for A, B,
C allele and no crossing over occur than type of
gamete formed is(A) 1
(B) 2
(C) 3
(D) 8
29.
Across between pure tall pea plant with green pods
and dwarf pea plant with yellow pods will produce
short f 2 plants out of 16
(A) 9
(B) 3
(C) 4
(D) 1
20.
21.
Dihybrid cross is made between RRYY (wrinkled
yellow seed) and yyrr (wrinkled green seed) of pea
F2 ratio amongst round yellow , round green ,
wrinkled yellow, and wrinkled green would be
(A) 9:3:3:1
(B) 15:1:0:0
(C) 9:3:4:0
(D) 4:4:4:4
How many types of gametes are formed by pea
plants having YYRRtt genotype
(A) 2
(B) 4
(C) 8
(D) 1
3
30.
Cross AABb x aaBb yield AaBB : AaBb : Aabb :
aabb offspring in the ratio of
(A) 0:3:1:1
(B) 1:2:1:0
(C) 1:1:1:1
(D) 1:2:1:1
39.
Give number of gamete produced by ttRRYY(A) one
(B) two
(C) four
(D) eight
31.
Any progeny which is heterozygous at two gene loci
crossed same genotype will give number of progeny
similar to parental type genotype is –
(A) 1
(B) 2
(C) 4
(D) 6
40.
Which result is confirmed by law of dominance (A) F1 have only one type of progeny
(B) F2 have ratio 3:1
(C) No blending
(D) Both A and B
32.
Cross between AAbbCC and aaBBcc made, the
number of progeny with AaBbCc genotype in F2
generation are
(A) 16
(B) 2
(C) 4
(D) 8
41.
Number of allele in gamete for one character can
be(A) three
(B) many
(C) Five
(D) one
42.
Which is not true for factor –
(A) Discrete unit
(B) Occur in pair in gamete
(C) Occur in pair in zygote
(D) Not show blending
43.
Which is correct ratio of Dihybrid test cross with
heterozygous condition at both gene loci –
(A) 1:1
(B) 1:1:1:1
(C) 3:1
(D) 1:1:2
44.
Consider the following statement(a)
Blending of factor not occur in F1
generation
(b) Gamete always get one factor out of pair
Mark the correct(A) only a
(B) only b
(C) both a and b
(D) both wrong
45.
Give number of homozygous gene loci in TtRRYY
(A) Two
(B) Three
(C) three
(D) Five
46.
Give Genotype of tall round plant which when test
crossed with recessive parent give ratio 1:1
(A) TTRR
(B) TtRR
(C) TTtt
(D) ttRR
47.
A cross of …X……..with ttrr give two type of
phenotype than genotype of X is (A) TTRR
(B) TtYY
(C) TtRR
(D) all of the above
33.
Year in which mendel’s work get published(A) 1865
(B) 1869
(C) 1859
(D) 1856
34.
Which is incorrect about mendelian factor’s(A) Occur in pair
(B) Unit of inheritance
(C) Segregate during gamete formation
(D) Show blending
35.
Which of the following in non-heritable
(A) Point mutation
(B) Chromososmal mutation
(C) Gene mutation
(D) Somatic mutation
36.
In Monohybrid test cross of heterozygous , ratio
obtained is…… (A) 1:1
(B) 1:1:1
(C) 3 :1
(D) none of the above
37.
Give number of gamete produced by TtRrYY(A) one
(B) two
(C) four
(D) Eight
38.
Which is incorrect about test cross(A) Type of back cross
(B) Give ratio 1:1
(C) Give ratio 3:1
(D) Cross with recessive parent
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48.
Which of the following cross can give ratio 3:1 –
(A) Monohybrid in F1
(B) Test cross of monohybrid
(C) Monohybrid in F2
(D) All of the above
49.
In a test cross of trihybrid give ratio 1:1 means
(A) Heterozygous at three gene loci
(B) Homozygous at two gene loci
(C) Homozygous at one gene loci
(D)
Heterozygous at all gene loci
50.
Which of the following cross will give recessive
progeny (A) TT X tt
(B) Tt X TT
(C) tt X tt
(D) TT X TT
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Answer Key
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(C)
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(D)
(A)
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(A)
(A)
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(A)
(A)
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(D)
(A)
(D)
(D)
(A)
(C)
(C)
(A)
(D)
(D)
(B)
(B)
(C)
(A)
(B)
(C)
(C)
(B)
(C)
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