Q.1.
on Q254) Which one of the following conditions correctly describes the manner of determining the sex?
-
33%
a) Homozygous sex chromosomes (ZZ) determine female sex in birds
-
67%
b) XO type of sex chromosomes determine male sex in grasshopper
-
0%
c) XO condition in humans as found in Turner's syndrome, determines female sex
-
0%
d) Homozygous sex chromosomes (XX) produce male in Drosophila
Q.2.
on Q255) Dihybrid cross proves the law of AIPMT - 1992
-
33%
a) segregation
-
0%
b) Purity of gametes
-
33%
c) Dominance
-
33%
d) Independent assortment
Q.3.
on Q256) Exhibition of superiority by a hybrid over both of its parents is called
-
50%
a) heterosis
-
50%
b) hybridization
-
0%
c) hypostasis
-
0%
d) dominance
Q.4.
on Q257) Down's syndrome is an example of
-
33%
a) monosomy
-
67%
b) trisomy
-
0%
c) triploidy
-
0%
d) polyploidy
Q.5.
on Q258) The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
-
0%
a) all heterozygous tall
-
33%
b) two tall and two dwarf
-
67%
c) one homozygous tall, two heterozygous tall and one homozygous dwarf
-
0%
d) all homozygous dwarf.
Q.6.
on Q259) The law of Segregation is based on the fact that
-
67%
a) The Alleles do not show any blending
-
0%
b) There is random fertilization
-
33%
c) Gametes are pure for the trait
-
0%
d) The zygotes are diploid
Q.7.
on Q260) Suppose a gene has seven alleles. What would be the number of alleles in an individual at any instant?
-
50%
a) 1
-
50%
b) 7
-
0%
c) 2
-
0%
d) 3
Q.8.
on Q261) Identify the incorrect statement:
-
0%
a) In addition to recombination, mutation is another phenomenon that leads to variation in DNA.
-
0%
b) Chromosomal aberrations are commonly observed in cancer cells.
-
0%
c) A classical example of a point mutation is sickle cell anaemia.
-
100%
d) Non ionising radiations cannot be mutations.
Q.9.
on Q262) One of the Mendel's pure strains of pea plants had green peas. How many different types of eggs could such a plant produce with regard to pea colour?
-
0%
a) 1
-
100%
b) 2
-
0%
c) 4
-
0%
d) 8
Q.10.
on Q263) The mechanism that causes a gene to move from one linkage group to another is called
-
0%
a)inversion
-
0%
b) duplication
-
50%
c) translocation
-
50%
d) crossing-over
Q.11.
on Q264) If both parents are carriers for Thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
-
0%
a) No chance
-
0%
b) 50%
-
100%
c) 25%
-
0%
d) 100%
Q.12.
on Q326) What kind of chromosomal aberrations is seen in the given diagram?
-
0%
a) Deletion
-
0%
b) Duplication
-
0%
c) inversion
-
100%
d) Translocation
Q.13.
on Q265) Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?
-
0%
a) The discrete unit controlling a particular character is called a factor
-
0%
b) Out of one pair of factors one is dominant, and the other is recessive
-
0%
c) Alleles do not show any blending and both the characters recover as such in F2 generation.
-
100%
d) Factors occur in pairs
Q.14.
on Q266) Which one of the following condition in human is correctly matched with its chromosomal abnormality/linkage?
-
0%
a) Klinefelter's syndrome—44 autosomal + XXY
-
0%
b) Colour-blindness —Y-linked
-
0%
c) Erythroblastosis foetalis— X-linked
-
0%
d) Down syndrome—44 autosomal + XO
Q.15.
on Q267) In pea plants, yellow seeds are dominant to green. If heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green plants would you expect in F1 generation?
-
0%
a) 50: 50
-
0%
b) 9: 1
-
0%
c) 1: 3
-
0%
d) 3: 1
Q.16.
on Q268) A pure tall red plant is crossed with a pure dwarf white plant. The progenies thus produced in F1 generations are selfed. The different types of gametes that will be produced in F2 generation will be
-
0%
a) 2
-
0%
b) 4
-
0%
c) 8
-
0%
d) 16
Q.17.
on Q269) Given below is a pedigree chart of a family with five children. It shows the inheritance of attached ear-lobes as opposed to the free ones. The squares represent the male individuals and circles the females’ individuals. Which one of the following conclusions drawn is correct?
-
0%
a) The parents are homozygous recessive.
-
0%
b) The trait is Y-linked.
-
0%
c) The parents are homozygous dominant.
-
0%
d) The parents are heterozygous.
Q.18.
on Q270) Which of the following is correct?
-
0%
a) Henking discovered the small Y-chromosome.
-
0%
b) Drosophila also shows XX-XY sex determination like human.
-
0%
c) Birds have ZZ-ZW sex determination, where females are ZZ and males are ZW.
-
0%
d) Grasshoppers show XX-XY sex determination.
Q.19.
on Q271) Which one of the following best describe polygenic inheritance?
-
0%
a) ABO blood group in human and flower colour of Mirabilis jalapa
-
0%
b) Hair pigment of mouse and tongue rolling in humans
-
0%
c) Human eye colour and sickle-cell anaemia
-
0%
d) Human height and colour of skin and eyes
Q.20.
on Q272) “Filial 1 progeny” refers to
-
0%
a) First pure breed
-
0%
b) First offspring
-
0%
c) First hybrid generation
-
0%
d) Second hybrid generation
Q.21.
on Q273) What will be the genotype of parental plants if they produced 25 AA: 48 Aa: 26 aa
-
0%
a) AA and AA
-
0%
b) AA and aa
-
0%
c) Aa and Aa
-
0%
d) aa and aa
Q.22.
on Q274) Percentage of monohybrids produced in dihybrid in F2:
-
0%
a) 12.5.
-
0%
b) 25.
-
0%
c) 50.
-
0%
d) 75.
Q.23.
on Q275) Genotypic and phenotypic ratios of monohybrid cross are
-
0%
a) 3:1 and 1:2:1
-
0%
b) 1:2:1 and 3:1
-
0%
c) 1:2:1 and 1:2:1
-
0%
d) 3:1 and 3:1
Q.24.
on Q276) A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea plant. If the plant is selfed, the genotype in the F1 generation is most likely to be
-
0%
a) all tall
-
0%
b) 50% tall and 50% dwarf
-
0%
c) all dwarf
-
0%
d) data insufficient
Q.25.
on Q277) The condition in which only one allele of a pair is present is known as
-
0%
a) Homozygous
-
0%
b) Heterozygous
-
0%
c) Hemizygous
-
0%
d) Incomplete dominance
Q.26.
on Q278) “When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters". This is the statement of:
-
0%
a) Law of Dominance
-
0%
b) law of segregation
-
0%
c) Law of Independent Assortment
-
0%
d) Law of Linkage
Q.27.
on Q279) The trait shown in the given pedigree chart is most likely a/an:
-
0%
a) Autosomal recessive trait
-
0%
b) Autosomal dominant trait
-
0%
c) Sex linked recessive trait
-
0%
d) Sex linked dominant trait
Q.28.
on 280) Pick out the correct statements. I. Haemophilia is a sex-linked recessive disease II. Down's syndrome is due to aneuploidy. III. Phenylketonuria is an autosomal recessive gene disorder IV. Sickle cell anaemia is an x - linked recessive gene disorder
-
0%
a) II and IV are correct
-
0%
b) I, III and IV are correct
-
0%
c) I, II and III are correct
-
0%
d) I and IV are correct
Q.29.
on Q281) Select the incorrect statement from the following
-
0%
a) linkage is an exception to the principle of independent assortment in heredity
-
0%
b) galactosemia is an inborn error of metabolism
-
0%
c) small population size results in random genetic drift in a population
-
0%
d) baldness is a sex limited trait
Q.30.
on Q282) Which of the following is not an autosomal genetic disorder?
-
0%
a) Sickle-cell anaemia
-
0%
b) Cystic fibrosis
-
0%
c) Haemophilia
-
0%
d) Huntington's disease
Q.31.
on Q283) The "cri-du-chat" syndrome is caused by change in chromosome structure involving
-
0%
a) deletion
-
0%
b) duplication
-
0%
c) inversion
-
0%
d) translocation
Q.32.
on Q284) How many genome types are present in a typical green plants cell?
-
0%
a) More than Five
-
0%
b) More than Ten
-
0%
c) Two
-
0%
d) Three
Q.33.
on Q285) If 'A' represents the dominant gene and 'a' represents its recessive allele, which of the following would be the most likely result in the first generation offspring when Aa is crossed with aa?
-
0%
a) All will exhibit dominant phenotype.
-
0%
b) All will exhibit recessive phenotype.
-
0%
c) Dominant and recessive phenotypes will be 50% each.
-
0%
d) Dominant phenotype will be 75%
Q.34.
on Q327) Assertion (A) - There is parallelism between the behavior of chromosome and Mendelian factors. Reason (R) - Genes are located on chromosomes
-
0%
a) If both (A) and (R) are true and (R) is the correct explanation of (A)
-
0%
b) If both (A) and (R) are true but (R) is not the correct explanation of (A)
-
0%
c) If (A) is true but (R) is false
-
0%
d) If both (A) and (R) are false.
Q.35.
on Q286) Genotypic and phenotypic ratios 1: 2: 1 in the offspring’s explain the principle of
-
0%
a) dominance
-
0%
b) blending inheritance
-
0%
c) recessiveness
-
0%
d) All of the above
Q.36.
on Q287) How many true breeding pea plant varieties had been selected by Mendel?
-
0%
a) 1
-
0%
b) 7
-
0%
c) 14
-
0%
d) 16
Q.37.
on Q288) Among the given pea plant traits identify the odd one
-
0%
a) Violet flower
-
0%
b) Yellow seed
-
0%
c) Yellow pod
-
0%
d) Axial flower position
Q.38.
on Q289) Gregor Mendel is known for ... ....
-
0%
a) Species concept
-
0%
b) Hybridisation experiments
-
0%
c) Discovery of chromosomes
-
0%
d) Experiments on maize plant
Q.39.
on Q290) In the binomial expression of Mendelian monohybrid genotypic ratio, 2ab denotes:
-
0%
a) (1/4)TT.
-
0%
b) (1/4)tt.
-
0%
c) (1/2)Tt.
-
0%
d) None of these.
Q.40.
on Q291) Match the terms in column I with their description in column II and choose the correct option:
| Column I | Column II |
| a. Dominance | Many genes govern a single character |
| b. Co – dominance | In a heterozygous organism only one allele get expressed |
| c. Pleiotropy | In a heterozygous organism both alleles express themselves fully |
| d. Polygenic inheritance | A single gene influences many characters. |
-
0%
a) a=2; b=3; c=4; d=1
-
0%
b) a=4; b=1; c=2; d=3
-
0%
c) a=4; b=3; c=1; d=2
-
0%
d) a=2; b=1; c=4; d=3
Q.41.
on Q292) Technique(s) used by Mendel for his hybridisation experiments
-
0%
a) Emasculation
-
0%
b) Bagging
-
0%
c) Artificial hybridisation
-
0%
d) All of the above
Q.42.
on Q293) Incomplete dominance is present in
-
0%
a) Snapdragon flower
-
0%
b) Dog flower
-
0%
c) Antirrhinum flower
-
0%
d) All of the above
Q.43.
on Q294) ABO blood groups are controlled by which gene
-
0%
a) a
-
0%
b) i
-
0%
c) b
-
0%
d) All of the above
Q.44.
on Q295) Pairing and separation of a pair of chromosomes would lead to segregation of a pair of factors they carried. This conclusion was drawn by
-
0%
a) Walter Sutton
-
0%
b) Theodore Bovary
-
0%
c) both (1) and (2)
-
0%
d) Thomas Hunt Morgan
Q.45.
on Q296) Given the parents AABBCc × AabbCc, assume simple dominance and independent assortment. What proportion of the progeny will be expected to phenotypically resemble the first parent?
-
0%
a) 1/4
-
0%
b) 1/8
-
0%
c) 3/4
-
0%
d) 3/8
Q.46.
on Q297) The initial studies for sex determination were done over
-
0%
a) Plants
-
0%
b) Insects
-
0%
c) Humans
-
0%
d) Hen
Q.47.
on Q298) Pedigree analysis is not utilized to trace
-
0%
a) Specific trait
-
0%
b) Sex ratio
-
0%
c) Disease
-
0%
d) Abnormality
Q.48.
on Q299) Elongated sickle like structure of RBC is produced by
-
0%
a) Platelets deposition on the outer surface of RBC
-
0%
b) Reduced surface tension
-
0%
c) Polymerisation of mutant haemoglobin under high oxygen tension.
-
0%
d) Polymerisation of mutant haemoglobin under low oxygen tension.
Q.49.
on Q300) In case of Pea plant, grey seed colour (G) is dominant to white (g). If the progenies are formed in the following phenotypic ratio, find the genotypes of parents. Grey was crossed with white, 82 grey and 0 white were formed. The genotype of the grey parent will be
-
0%
a) Gg
-
0%
b) GG
-
0%
c) gg
-
0%
d) gG
Q.50.
on Q301) In a test cross of F1 generation, having a genotype AaBb, following progeny were obtained AaBb- 450 aabb – 450 Aabb- 50 aaBb- 50 How far in centimorgans are the a and b genes?
-
0%
a) 100
-
0%
b) 90
-
0%
c) 10
-
0%
d) 1