Q.1
on Q409) , has been mutated to , the type of gene mutation happened in DNA is:
unit-7_ch-2_que_no-409_img_no1.png
unit-7_ch-2_que_no-409_img_no2.png
  • a) Transition only.
  • b) Transversion only.
  • c) Transition and transversion.
  • d) Frame shift mutation.
Q.2
on Q410) Which one of the following symbols and its representation, used in human pedigree analysis is correct?
  • a)
    unit-7_ch-2_qn-410choice_img_no1.png
  • b)
    unit-7_ch-2_qn-410choice_img_no2.png
  • c)
    unit-7_ch-2_qn-410choice_img_no3.png
  • d)
    unit-7_ch-2_qn-410choice_img_no4.png
Q.3
on Q411) The mapping of genes on chromosome was attempted by
  • a) T. H. Morgan
  • b) Walter Sutton
  • c) Alfred Sturtevant
  • d) Henking
Q.4
on Q412) In the results, F2 generation of Mendelian dihybrid cross in pea plant. The ratio of green and wrinkled seeded pea plant is
  • a) 1/16
  • b) 3/16
  • c) 4/16
  • d) 7/16
Q.5
on Q413) If F2 dwarf plants were self-pollinated then the genotype of F3 & F4 plants is
  • a) TT and Tt
  • b) tt and tt
  • c) tt and Tt
  • d) Tt and Tt
Q.6
on Q414) How many laws of Mendel are based on monohybrid cross?
  • a) 1
  • b) 2
  • c) 3
  • d) 4
Q.7
on Q415) Who is known as father of physiological genetics or father of biochemical genetics?
  • a) Slatyer
  • b) Charles Elton
  • c) Taylor
  • d) Archibald Garrod
Q.8
on Q416) Consider the cross AaBb x AaBb. If the alleles for both genes exhibit complete dominance, what genotypic ratio is expected in the resulting offspring?
  • a) 1:1:1:1
  • b) 9:3:3:1
  • c) 3:6:3:1:2:1
  • d) 1:2:1:2:4:2:1:2:1
Q.9
on Q417) The genotypes of a husband and wife are IA IB and IAi. Among the blood types of their children, how many different genotypes and phenotypes are possible?
  • a) 3 genotypes; 3 phenotypes
  • b) 3 genotypes; 4 phenotypes
  • c) 4 genotypes; 3 phenotypes
  • d) 4 genotypes; 4 phenotypes
Q.10
on Q418) Self fertilising trihybrid plants from
  • a) Eight different gametes and 64 different zygotes
  • b) Four different gametes and sixteen different zygotes
  • c) Eight different gametes and sixteen different zygotes
  • d) Eight different gametes and thirty two different zygotes
Q.11
on Q419) If a dwarf pea plant which is treated with growth regulators becomes a tall plant, which on selfing gives:
  • a) Only dwarf plants.
  • b) Only tall plants.
  • c) Tall and dwarf in 3: 1 ratio.
  • d) Tall and dwarf in 1: 1 ratio.
Q.12
on Q420) By which gene sex is determind in Spinach ?
  • a) Single gene "m" located in the X- chromosome
  • b) Single gene "m" located in the Y- chromosome
  • c) Single gene "t" located in the X- chromosome
  • d) Single gene "t" located in the Y- chromosome
Q.13
on Q421) Which technique is used by Mendel for hybridization ?
  • a) Emasculation
  • b) Bagging
  • c) Protoplast fusion
  • d) Both A & B
Q.14
on Q422) Types of phenotypes of F2 generation of dihybrid cross ?
  • a) 4
  • b) 16
  • c) 8
  • d) 9
Q.15
on Q423) Genetic balance theory for sex determination in Drosophila was proposed by
  • a) Prof. R. P. Roy
  • b) H. E. Warmbe
  • c) C.B. Bridges
  • d) Mc. Chang
Q.16
on Q424) A cross between hybrid and a parent is known as
  • a) Test cross
  • b) Back cross
  • c) Monohybrid cross
  • d) Reciprocal cross
Q.17
on Q425) What is the basis of pleiotropy?
  • a) A spontaneous mutation during the replication of DNA.
  • b) Interrelationship between various metabolic pathways in the body.
  • c) Chromosomal aberration as chromosomes are the vehicles of genes.
  • d) the behaviours of chromosomes during meiosis or gamete formation.
Q.18
on Q426) Assertion (A) :- Crossing over leads to genetic variation. Reason (R) :- Crossing over causes recombination of characters.
  • a) If both (A) and (R) are true and (R) is the correct explanation of (A)
  • b) If both (A) and (R) are true but (R) is not the correct explanation of (A)
  • c) If (A) is true but (R) is false
  • d) If both (A) and (R) are false.
Q.19
on Q427) A woman with 47 chromosomes due to 3 copies of chromosome 21 is characterized by
  • a) Super Femaleness
  • b) Triploidy
  • c) Turner's Syndrome
  • d) Down's Syndrome
Q.20
on Q428) Represented below is the inheritance pattern of a certain type of trait in humans. Which one of the following conditions could be an example of this pattern?
unit-7_ch-2_que_no-428_img_no1.png
  • a) Phenyl ketonuria
  • b) Sickle Cellanaemia
  • c) Haemophilia
  • d) Thalassemia
Q.21
on Q429) Name the abnormality seen in chromosome number – 2
unit-7_ch-2_que_no-429_img_no1.png
  • a) Interstitial Deletion
  • b) Terminal Deletion
  • c) Tandem Duplication
  • d) Reverse Duplication
Q.22
on Q430) Observe the following genotype of parents who are about to mate: RrYyTtGg × RRYyTtGg; if you are asked to draw a punnet square to represent their offsprings, how many boxes will you put in the square?
  • a) 64
  • b) 32
  • c) 128
  • d) 256
Q.23
on Q431) A homozygous grey bodied, long winged Drosophila is crossed with homozygous black bodied vestigial wings. The F1 is test crossed and we get; Grey bodied long wings – 470, Grey bodied vestigial wings – 185, Black bodied vestigial wings – 450 and black bodied long wings –What is the distance between the genes for body colour and wings shape of Drosophila?
  • a) 14cM.
  • b) 72cM.
  • c) 28cM.
  • d) 36cM.
Q.24
on Q432) Which one of the following condition in humans is correctly matched with its chromosomal abnormality/linkage?
  • a) Erythroblastosis foetalis - X-linked.
  • b) Down syndrome - 44 autosomes + XO.
  • c) Klinefelter's syndrome - 44 autosomes + XXY.
  • d) Colour blindness - Y-linked.
Q.25
on Q433) Which of the following terms best describes when the phenotype of the heterozygote differs from the phenotypes of both homozygotes?
  • a) Incomplete dominance
  • b) Multiple alleles
  • c) Co dominance
  • d) Epistasis
Q.26
on Q434) Law of Independent Assortment is not applicable to
  • a) Linked genes
  • b) Genes on different chromosomes
  • c) Distantly located gene
  • d) both (2) and (3)
Q.27
on Q435) Trait expressed in F1 generation is
  • a) Parental
  • b) Recessive
  • c) Dominant
  • d) Recombinant
Q.28
on Q436) Mendel was born in
  • a) 19th century.
  • b) 18th century.
  • c) 17th century.
  • d) 20th century.
Q.29
on Q437) James Watson and Francis Crick got Nobel prize in the year
  • a) 1960
  • b) 1962
  • c) 1959
  • d) 1953
Q.30
on Q438) Which of the following occurs due to monosomy of sex chromosome?
  • a) Down's syndrome
  • b) Turner's syndrome
  • c) Haemophilia
  • d) Sickle cell anaemia
Q.31
on Q439) Base substitutions from base analogues I are called
  • a) transitions
  • b) transversions
  • c) intragenic complementation
  • d) intergenic complementation
Q.32
on Q440) A woman with normal vision, but whose father was colourblind, marries a colourblind man. Suppose that the fourth child of this couple was a boy. This boy
  • a) May be colourblind or may be of normal vision
  • b) Must be colourblind
  • c) Must have normal colour vision
  • d) Will be partially colourblind since he is heterozygous for the colourblind mutant allele.
Q.33
on Q441) F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1 . It represents in case of AIPMT - 2012
  • a) Co - Dominance
  • b) Dihybrid Cross
  • c) Monohybrid cross with complete dominance
  • d) Monohybrid cross with incomplete dominance
Q.34
on Q442) The value of X/A is given in column A and sex of the fly is written in column B. Match the following :-
Column I Column II
1 (a) Normal Male
1.5 (b) super male Sterile
0.67 (c) inter sex
0.33 (d) super Female sterile
0.5 (e) Normal Female
  • a) (1 - a) (2 - d) (3 - c) (4 - e) (5 - b)
  • b) (1 - e) (2 - d) (3 - c) (4 - b) (5 - a)
  • c) (1 - b) (2 - a) (3 - c) (4 - d) (5 - e)
  • d) (1 - e) (2 - c) (3 - d) (4 - a) (5 - b).
Q.35
on Q443) which cross yielded a ratio of 7:1 :1:7 ?
  • a) Test cross (Dihybrid) - Bateson and punnet
  • b) Test cross (Monohybrid) - Bateson and punnet
  • c) Test cross (Dihybrid) - Carrel correns
  • d) Test cross ( Dihybrid) - Mendel & Morgan
Q.36
on Q444) “Gametes are never hybrid”. This is a statement of:
  • a) Law of dominance.
  • b) Law of independent assortment.
  • c) Law of segregation.
  • d) Law of random fertilization.
Q.37
on Q445) Percentage of recombination between A and B is 9% and C is 17%, B and C is 26%, then what is the arrangement of genes?
  • a) ABC.
  • b) ACB.
  • c) BCA.
  • d) BAC.
Q.38
on Q446) Excessive growth of hair on the pinna is a feature found only in males because:
  • a) The gene responsible for the character is recessive in females and dominant only in males.
  • b) The character is induced in males as males produce progesterone.
  • c) The female sex hormone oestrogen suppresses the character in females.
  • d) The gene responsible for the character is present on the Y chromosome only.
Q.39
on Q447) ABO blood groups is determined by three different alleles. How many genotypes and phenotypes are possible?
  • a) Genotype – 3, phenotype – 1.
  • b) Genotype – 6, phenotype – 4.
  • c) Genotype – 4, phenotype – 6.
  • d) Genotype – 9, phenotype – 7.
Q.40
on Q448) Conditions of a karyotype 2n ± 1 and 2n ± 2 are called:
  • a) Aneuploidy.
  • b) Polyploidy.
  • c) Allopolyploidy.
  • d) Monosomy.
Q.41
on Q449) If a character is controlled by 5 alleles, what will be the number of genotype in this case?
  • a) 12
  • b) 18
  • c) 30
  • d) 15
Q.42
on Q450) Mendelian disorders are caused by
  • a) Mutation in the single chromosome
  • b) Mutation in the single gene
  • c) Polyploidy
  • d) Aneuploidy
Q.43
on Q451) Mutation causes
  • a) alterations at protein level
  • b) changes in genotype only
  • c) changes in phenotype
  • d) both (2) and (3)
Q.44
on Q452) Who was the first to use statistical analysis and mathematical logics for solving biological problems?
  • a) Francis crick
  • b) Gregor Mendel
  • c) Hugo de Vries
  • d) W. Bateson
Q.45
on Q453) Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridised, then F2 segregation will show:
  • a) higher number of the recombinant types
  • b) segregation in the expected 9: 3: 3: 1 ratio
  • c) segregation in 3: 1
  • d) higher number of the parental types
Q.46
on Q454) Mutations can be induced with
  • a) IAA
  • b) ethylene
  • c) gamma radiations
  • d) infra red radiations
Q.47
on Q455) Among the following characters, which one was not considered by Mendel in his experiments on pea?
  • a) Stem - Tall or Dwarf
  • b) Trichomes - Glandular or Non-glandular
  • c) Seed - Green or Yellow
  • d) Pod - Inflated or Constricted
Q.48
on Q456) When Morgan hybridised yellow-bodied, white-eyed females to brown-bodied, red-eyed males and intercrossed their F1 progeny, the F2 ratio deviated very significantly from the 9:3:3:1 ratio. this can be attributed to the fact that:
  • a) The genes are located on X and Y chromosomes
  • b) Fruit fly has abnormal chromosomes
  • c) The genes are located on the X chromosome
  • d) the genes exhibit incomplete dominance
Q.49
on Q457) Genes which code for a pair of contrasting traits or slightly different forms of the same gene are known as
  • a) Alleles
  • b) Loci
  • c) Cistrons
  • d) Introns
Q.50
on Q458) Mutations which are not dominant are not lost by a gene pool this is known as
  • a) Survival of the dominant
  • b) Survival of the recessive
  • c) Hardly-Weinberg law
  • d) None of these
0 h : 0 m : 1 s