Q.1
on Q151) Genotype is
  • a) Genetic composition of many organisms.
  • b) Genetic composition of plastids.
  • c) Genetic composition of germ cells.
  • d) Genetic composition of an individual.
Q.2
on Q152) Which among the following statements are correct? (i) Strength of linkage is directly proportional to distance between the genes. (ii) Number of parental gamete is directly proportional to strength of linkage. (iii) Number of recombinant gamete is directly proportional to distance between genes. (iv) Reason for the occurrence of recombinants in the case of linkage is crossing over.
  • a) (i) only.
  • b) (ii), (iii) and (iv) only.
  • c) (iv) only.
  • d) (ii) and (iii) only.
Q.3
on Q153) Frame shift mutation occurs when:
  • a) Base is deleted.
  • b) Base is deleted or added.
  • c) Base is added.
  • d) Anticodons are not present.
Q.4
on Q154) In a given DNA segment ATGACCAGGACCCCAACA, the first base gets mutated through silent substitution. The effect of this on coding by this DNA segment will result in
  • a) Complete change in the type as well as sequence of amino acids.
  • b) Change in the first amino acid only.
  • c) No change in the sequence.
  • d) One amino acid less in the protein.
Q.5
on Q155) Select the statements that describe characteristics of genes. (i) Genes are specific sequence of bases in a DNA molecule. (ii) A gene does not code for proteins. (iii) In individuals of a given species, a specific gene is located on a particular chromosome. (iv) Each chromosome has only one gene.
  • a) (i) and (ii).
  • b) (i) and (iii).
  • c) (i) and (iv).
  • d) (ii) and (iv).
Q.6
on Q156) Cri-du-chat syndrome in humans is caused by
  • a) Trisomy of the 21st chromosome
  • b) Loss of half of the short arm of chromosome 5
  • c) Loss of half of the long arm of chromosome 5
  • d) Fertilization of an XX egg by a normal Y-bearing sperm
Q.7
on Q175) In a pea plants, green pod colour is dominant over yellow pods. 1000 seeds taken from a pea plant on germination produces 760 green pod and 240 yellow pod plants. The parental genotype and phenotype of the seed plant are
  • a) Heterozygous and yellow
  • b) heterozygous and green
  • c) homozygous and yellow
  • d) homozygous and green
Q.8
on Q157) How many of the following are true regarding Haemophilia? (i) It is due to the mutation of R – allele of a gene. (ii) Heterozygous genotype in male will be a carrier. (iii) Disease will be expressed only in the homozygous condition of the respective gene. (iv) Disease is easily expressed in males. (v) Haemophilia is due to the absence of some proteins necessary for blood clotting.
  • a) (iii), (iv) and (v) only.
  • b) (i), (iii), (iv) and (v).
  • c) (ii) only.
  • d) (i), (iii) and (iv).
Q.9
on Q158) Which among the following pairs correlating the genetical terms and proponents are wrongly matched?
  • a) Genetics, alleles – William Bateson.
  • b) Gene, Genotype – Johansson.
  • c) Homozygous, heterozygous – T. H. Morgan.
  • d) Mutation – Hugo de Vries.
Q.10
on Q159) In Morgan’s experiments on incomplete linkage, the percentage of recombinants in F2 generation is:
  • a) 1.3.
  • b) 37.2.
  • c) 62.8.
  • d) 73.2.
Q.11
on Q160) If fruit weight in a plant was measured and following categories were obtained- 25g; 30g; 35g; 40g; 45g; 50g; 55g.Then, how many genes are involved for controlling fruit weight?
  • a) 2
  • b) 3
  • c) 5
  • d) 7
Q.12
on Q161) Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary in nature. Suppose T stands for dominant gene and t for recessive gene, the genetic makeup of a person who cannot taste is
  • a) TT
  • b) Tt
  • c) tt
  • d) None of these
Q.13
on Q162) When two genes are situated very close to each other in a chromosome
  • a) the percentage of crossing over between them is high
  • b) hardly any cross-over detected
  • c) no crossing-over can ever take place between them
  • d) only double cross over can take place between them.
Q.14
on Q163) Round seed trait (R) is dominant over wrinkled (r) seed trait in Pea. Heterozygous round seeded plant (Rr) is crossed with wrinkled seed plant (rr). What is the possible progeny?
  • a) 302 round: 102 wrinkled
  • b) 210 round: 95 wrinkled
  • c) 103 round: 99 wrinkled
  • d) 103 round: 315 wrinkled
Q.15
on Q164) Identify the incorrect statement:
  • a) Tall plant produces gametes by meiosis and the dwarf plant by mitosis
  • b) Only one allele is transmitted to a gamete.
  • c) This segregation of alleles is a random process.
  • d) Gametes will always be pure for the trait.
Q.16
on Q165) When the two genes in a dihybrid cross are situated on the same chromosome:
  • a) The proportion of parental gene combinations was much higher than the non-parental type
  • b) The proportion of parental gene combinations was much lesser than the non-parental type.
  • c) The propagation of parental gene combinations was equal to the non-parental type
  • d) Only recombinants are formed
Q.17
on Q166) Two phenotypically normal individuals have an affected child. What can we conclude about the parents?
  • a) they both carried the disease allele
  • b) they are not the parents of the child
  • c) they are affected
  • d) no conclusions can be drawn
Q.18
on Q167) Thalassemia and sickle-cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement.
  • a) Both are due to a qualitative defect in globin chain synthesis
  • b) Both are due to a quantitative defect globin chain synthesis
  • c) Thalassemia is due to less synthesis of globin molecules
  • d) Sickle-cells anaemia is due to a quantitative problem of globin molecules
Q.19
on Q168) 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 Ina heterozygous organism only one allele expresses itself
C. Pleiotropy In a heterozygous organism both alleles express themselves fully
D. Polygenic inheritance A single gene influences many characters
  • a) A=2 B=3 C=4 D=1
  • b) A=4 B=1 C=2 D=3
  • c) A=4 B=3 C=1 D=2
  • d) A=2 B=1 C=4 D=3
Q.20
on Q169) Fruit colour in squash is an example of
  • a) recessive epistasis
  • b) dominant epistasis
  • c) complementary genes
  • d) inhibitory genes
Q.21
on Q170) Select the correct statement from the ones given below with respect to dihybrid cross.
  • a) Tightly linked genes on the same chromosome show higher recombination
  • b) Genes far apart on the same chromosome show very few recombination
  • c) Genes loosely linked on the same chromosome show similar recombination as the tightly linked ones
  • d) tightly linked genes on the same chromosome show very few recombination.
Q.22
on Q171) Inheritance of skin colour in humans is an example of:
  • a) chromosomal aberration
  • b) point mutation
  • c) polygenic inheritance
  • d) co dominance
Q.23
on Q172) Cri-du-chat syndrome in humans is caused by the:
  • a) fertilization of an XX egg by a normal Y-bearing sperm
  • b) loss of half of the short arm of chromosome 5
  • c) loss of half of the long arm of chromosome 5
  • d) trisomy of 21st chromosome.
Q.24
on Q173) An inherited character and its detectable variant is termed as
  • a) unit factor
  • b) trait
  • c) genetic profile
  • d) genotypic character
Q.25
on Q174) If a homozygous red-flowered plant is crossed with a homozygous white-flowered plant, the offspring’s will be
  • a) half-white flowered
  • b) half red-flowered
  • c) all white-flowered
  • d) all red-flowered
Q.26
on Q178) A true-breeding plant line can be obtained by
  • a) Cross pollination
  • b) Self pollination
  • c) Continuous Cross pollination
  • d) Continuous Self pollination
Q.27
on Q179) Which of the following genotype express gametes?
  • a) TtRrAa
  • b) TtRA
  • c) ATRr
  • d) NMLr
Q.28
on Q180) Lack of independent assortment of two genes A and B in fruit fly – Drosophila is due to:
  • a) Repulsion.
  • b) Recombination.
  • c) Linkage.
  • d) Crossing over.
Q.29
on Q181) Statement 1: In sickle cell anaemia the point mutation is called transversion. Statement 2: In this case, adenine is replaced by thymine.
  • a) Both statements -1 and statement - 2 are true and statement - 2 is the correct explanation of statement - 1.
  • b) Both statements -1 and statement - 2 are true but statement - 2 is not the correct explanation of statement - 1.
  • c) Statement -1 is true and statement - 2 is false.
  • d) Statement -1 is false and statement - 2 is true.
Q.30
on Q182) If a diploid cell is having the chromosome arrangement AABBCCDD, which among the change after mutation is not a type of aneuploidy?
  • a) AABBBCCCDD.
  • b) AAABBCDD.
  • c) AAABBBCCCDDD.
  • d) AABCDD.
Q.31
on Q183) Which of the following is a monohybrid?
  • a) TT
  • b) tt
  • c) Tt
  • d) None
Q.32
on Q184) Co-dominance refers to the condition where F1
  • a) resembles the dominant parent
  • b) is in-between the parents
  • c) resembled the recessive parents
  • d) resembles both the parents
Q.33
on Q185) Disorder caused by the trisomy of chromosome number 21
  • a) Klinefelter’s syndrome
  • b) Turner’s syndrome
  • c) Down’s syndrome
  • d) Phenylketonuria
Q.34
on Q186) Find correct match
Column I Column II
i. Down’s syndrome a. Broad palm with characteristic palm crease
ii. Klinefelter’s syndrome b. Gynaecomastia
iii. Turner’s syndrome c. rudimentary ovaries
- -   - - d. XO
- -   - - e. XXY
- -   - - f. physical development is retarded.
  • a) i-c, d; ii-b, e, f; iii-a
  • b) i-e, c; ii-b, f; iii-a, d
  • c) i-a; ii-b, e, f; iii-c, d
  • d) i-a, c; ii-d, e; iii-b, d
Q.35
on Q187) In guinea pigs, black coat colour is a dominant trait and white is a recessive trait. When heterozygous black pigs are intercrossed the chance of the first two offspring being black is:
  • a) 75 %
  • b) 56 %
  • c) 44 %
  • d) 6 %
Q.36
on Q188) In peas, a tall, yellow-seeded plant is crossed with a homozygous short, green-seeded plant. The numbers of progeny are: 203 [tall, green-seeded plants], 199 [short, green-seeded plants], 207 [tall, yellow-seeded plants] and 192 [short, yellow-seeded plants]. The most likely genotype of the tall, yellow-seeded parent is:
  • a) TtYy
  • b) TTYY
  • c) ttYY
  • d) ttyy
Q.37
on Q189) Which of the following statement is correct with respect to human sex determination?
  • a) The genetic makeup of egg determines the sex of child.
  • b) Female produces two types of ovum’s and males produce only one type of sperm.
  • c) Each pregnancy has more probability of male child than of female.
  • d) Out of 23 pairs of chromosomes, 22 are same both in males and females.
Q.38
on Q190) Which of the following disorder is associated with Queen Victoria?
  • a) Sickle cell anaemia
  • b) Haemophilia
  • c) Huntington's Disease
  • d) Myotonic dystrophy
Q.39
on Q191) Sex determination in Honey bee depends upon-
  • a) Number of sets of chromosomes present in parents
  • b) Number of sets of chromosomes present in progenies
  • c) Number of sets of genes present in progenies
  • d) Number of sets of genes present in progenies
Q.40
on Q192) If two parents with AaBBccdd and aaBbccdd were crossed. What is the probability of getting following genotypes? AABB and aabb
  • a) 9:3:3:1
  • b) 1:1
  • c) Only single type of progenies
  • d) 1:3
Q.41
on Q193) The genes which are involved in alpha Thalassemia are---- and ----- while in beta Thalassemia are----.
  • a) HBA1, HBB, HBA2
  • b) HBB1 HBB2 HBA
  • c) HBB1 HBA HBB2
  • d) HBA1 HBA2 HBB
Q.42
on Q194) Read the following statement and choose the correct option: (i) In Phenylketonuria the affected person does not secrete an enzyme to convert tyrosine to phenyl alanine. (ii) The possibility of a female becoming haemophilic is possible. (iii) Sickle cell anaemia is caused by the substitution of glutamic acid by valine at the fifth position of β – chain of haemoglobin molecule. (iv) Myotonic dystrophy is an autosomal dominant trait.
  • a) (i) and (ii) are wrong .
  • b) (ii) and (iii) are wrong.
  • c) (iii) are wrong.
  • d) (i) and (iii) are wrong.
Q.43
on Q195) Which among the following years of importance in genetics is wrongly matched?
  • a) Beginning of experiment by Mendel – 1856.
  • b) Re – discovery of Mendel’s work – 1900.
  • c) Publishment of Mendel’s work – 1884.
  • d) Chromosome theory of inheritance – 1902.
Q.44
on Q196) The dominant alleles A and B each add 2 g weight to a basal weight (in homozygous recessive condition) of 6g of fruits of a certain plant. If two plants, each with fruits weighing 8g and having heterozygous condition for one gene each are crossed, what phenotypic ratio is expected among the offspring?
  • a) 25% with 10g: 50% with 8g: 25% 6g fruit
  • b) 50% with 10g: 50% with 6g fruits
  • c) 25% with 12g: 25% with 10g: 25% with 8g: 25% with 6g fruits
  • d) 12.55 with 14g: 25% with 12g: 25% with 10g: 25% with 8g: 12.5% with 6g fruits
Q.45
on Q197) Which one of the followings is not correct for Huntington disease ________?
  • a) Caused by dominant allele.
  • b) Marked by progressive nerve degeneration.
  • c) Cause tumours and affects liver as well.
  • d) Affects the brain leading to mental disability and death.
Q.46
on Q198) Edward's syndrome, Patau's syndrome and Down's syndrome are due to
  • a) Mutation due to malnutrition.
  • b) Change in sex chromosomes.
  • c) Change in both sex chromosomes and autosomes.
  • d) Change in autosomes.
Q.47
on Q200) Which Mendelian cross can produce two genotypes and two phenotypes?
  • a) Monohybrid cross.
  • b) Monohybrid test cross.
  • c) Incomplete dominance.
  • d) Co dominance.
Q.48
on Q201) Which of the following is not a recessive trait considered by Mendel?
  • a) Yellow pod.
  • b) Wrinkled seed shape.
  • c) White flower colour.
  • d) Axial flower.
Q.49
on Q202) Assertion: Mendelian disorders are because of gene mutation and problematic genes are always present on sex chromosomes. Reason: Haemophilia, Sickle – cell anaemia and Phenylketonuria are Mendelian disorders which are due to the mutation of dominant alleles of genes.
  • a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  • b) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
  • c) Assertion is true but Reason is false.
  • d) Both Assertion and Reason are false.
Q.50
on Q203) Genotype - Phenotype concept was first produced by
  • a) Bateson
  • b) Johannsen
  • c) Sutton & Boveri
  • d) Punnet
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