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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
If dominant C and P genes are essential for the development of purple colour in Lathyrus odoratus flowers. What would be the ratio of purple and white colour in a cross between CcPp xcc Pp.A. `3:5`B. `9:7`C. `2:6`D. `4:4` |
| Answer» Correct Answer - A | |
| 52. |
When two pairs of traits are combined in a hybrid, segregaton of one pair of characters is independent of the other pair of characters is independent of the other pair of characters. The statement is independent of the other pair of characters. The statement explains which of the following laws/principles of Mendel ?A. Law of dominanceB. Law of degregationC. Law of independent assortmentD. Postulate of paired factors |
| Answer» Correct Answer - C | |
| 53. |
Assertion :- The family pedigree of Queen Victoria shows a number of haempphilic descendent as she was a carrier of the disease. Reason :- Haempphilia is a sex linked dominant disease which shows its transmission from unaffected carrier female to some of the male progenyA. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - C | |
| 54. |
nu body of nucleosome consists ofA. `H_(1)and H_(2)A`B. `H_(2)Aand H_(2)B`C. `H_(3)and H_(4)`D. Both 2 and 3 |
| Answer» Correct Answer - D | |
| 55. |
Sex-linked characters areA. LethalB. RecessiveC. DominantD. Not inherited |
| Answer» Correct Answer - B | |
| 56. |
In Drosophila crossing over occurs in female but not in male. Gene A and B are 10 map unit apart on chromsome. A female Drosphila with genotype `(AB)/(ab).` and male Desphila with genotype `(AB)/(ab).` How many type of gametes are produced by female and male Droaphila respectivelyA. `{:(4,"types",:,2,"types"):}`B. `{:(2,"types",:,2,"types"):}`C. `{:(4,"types",:,4,"types"):}`D. `{:(4,"types",:,"one","types"):}` |
| Answer» Correct Answer - A | |
| 57. |
Type of gene mutation which involves replacement of purine with pyrimidine vice versa or the substitution of one type of base with another type of base is :A. TransductionB. TransersionC. TranslocationD. Transcription |
| Answer» Correct Answer - B | |
| 58. |
Assertion: Mendelian disorders are transmitted to offspring on the same lines as in the principles of inheritance. Reason: The pattern of inheritance of Mendelian disorders cannot be traced in a family by the pedigree analysis.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - B | |
| 59. |
How is the sex of the child determined in human beings?A. Sex chromosome of motherB. Size of ovumC. Size of spermD. Sex chromosome of father |
| Answer» Correct Answer - D | |
| 60. |
Satellite DNA is useful tool inA. Forensic scienceB. Genetic engineeringC. Organ transplantationD. Sex detemination |
| Answer» Correct Answer - A | |
| 61. |
Assettion :- DNA polymorphism arises due to mutations. Reason : An inheritable mutation which is observed in a population at high frequency, is refered to as DNA polymorphism.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - B | |
| 62. |
When flowers are unisexual then emasculation is done in :-A. FemaleB. MlaeC. 1 & 2 bothD. none of these |
| Answer» Correct Answer - D | |
| 63. |
Protein synthesis in an animal cell occursA. On ribosomes present in cytoplasma as well as in mitochondriaB. On ribosomes present in the nucleolus as well as in cytoplasmC. Only on ribosomes attached to the unclear envelope and endoplamic retculumD. Only on the ribosomes present in cytosol |
| Answer» Correct Answer - A | |
| 64. |
Which one of the following pairs is correctly matched with regard to the codon and the amino acid coded by it `?`A. UUU-ValineB. AAA-LysineC. AUG-CysteineD. CCC-Alamino |
| Answer» Correct Answer - B | |
| 65. |
Assertion :- Genetic codes are unambigous & specific. Reason : Some amino acids are coded by more than one codon.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - B | |
| 66. |
What does 'lac' refer to in what we call the lac operon ?A. LactoseB. LactaseC. Lac insectD. The number 1,00,000 |
| Answer» Correct Answer - A | |
| 67. |
Due to the cross between TTRr `xx` ttrr the resultant progenies showed how many percent plants would be, tall, red flowered :-A. `50%`B. `75%`C. `25%`D. `100%` |
| Answer» Correct Answer - A | |
| 68. |
A dihybrid plant on self pollination, produced 400 phenotypes with 9 types of genotype. How many seeds will have genotype TtRr?A. 200B. 100C. 50D. 150 |
| Answer» Correct Answer - B | |
| 69. |
Mutations are commonlyA. DominantB. RecessiveC. CodominantD. Incompletely dominant |
| Answer» Correct Answer - B | |
| 70. |
Non-ionziny radiations commonly used for inducing mutations in organism are :-A. UV-raysB. Beta-raysC. X-raysD. Gamma-rays |
| Answer» Correct Answer - A | |
| 71. |
Mammorary glands in female, moustaches and beard in muman males are example ofA. Sex linked traitsB. Sex limited tratisC. Sex differentiating traitsD. Sex-determining traits |
| Answer» Correct Answer - B | |
| 72. |
the linkage map of X -chroosomes of fruitfly has 66 units with yellow body gene (y) at one end and bobbed hair (b) gene at the other end the recomnation frequency between these two genes (y and b) should be :A. `60%`B. `gt 50%`C. `le 50%`D. `100%` |
| Answer» Correct Answer - C | |
| 73. |
Possible blood groups of children born to parents having A and AB groups areA. O, AB. A, B, ABC. O, A, BD. O, A, B, AB |
| Answer» Correct Answer - B | |
| 74. |
Mr.Kapoor has Bb autosomal gene pair and d allele x-linked .When shall be the proportion of Bd in sperm ?A. `1//2 or 50%`B. `1//4or 25%`C. `3//4or 75%`D. `1 or 100%` |
| Answer» Correct Answer - A | |
| 75. |
Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female childA. One X and one Y chromosomeB. Two X chromosomeC. Only one Y chromosomeD. Only one X chromosome |
| Answer» Correct Answer - B | |
| 76. |
If the first seven children born to a particular pair of parents are all males, what is the probability that the eight child will also be a male?A. `1/2`B. `1/4`C. `1/8`D. `1/16` |
| Answer» Correct Answer - A | |
| 77. |
Assertion: In each pregnancy there is always 50 per cent probability of either a male or a female child. Reason: The genetic makeup of the sperm determines the sex of child.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - A | |
| 78. |
A man whose father was colour blind marries a woman who has a colour blind mother and normal father .What percentage of male childern of this couple will be colour blind ?A. `25%`B. `0%`C. `50%`D. `75%` |
| Answer» Correct Answer - B | |
| 79. |
Family has 9 girls, Probability of son at 10th birth is :-A. `50%`B. `100%`C. `25%`D. `75%` |
| Answer» Correct Answer - A | |
| 80. |
A man woman are both affected by vitamin D resistance rickets, which is a sominant sex-linked allele. All of the female of springs of this couple are affected with rickets but some of the male offsprings are not. What are the genotypes of the parents ?A. Both are homozygous for the trait.B. Two woman has two dominant alleles and man han one dominant allele.C. Both parents have only recessive alleles.D. Each parent has only one dominant allele. |
| Answer» Correct Answer - D | |
| 81. |
If a couple has four girls, the probability of fifth child being male isA. `50%`B. `25%`C. `75%`D. `100%` |
| Answer» Correct Answer - A | |
| 82. |
A family has five girls and no son, the probability of the occurance of son in `6^(th)` child is :-A. `1//2`B. `1//5`C. 1D. No chance |
| Answer» Correct Answer - A | |
| 83. |
What is the probability of three daughters to a couple in three children :-A. `1/4`B. `1/8`C. `1/16`D. `3/8` |
| Answer» Correct Answer - B | |
| 84. |
Probability of four son to a couple is :-A. `1/4`B. `1/8`C. `1/16`D. `1/32` |
| Answer» Correct Answer - C | |
| 85. |
Down syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder?A. `50%`B. `25%`C. `100%`D. `75%` |
| Answer» Correct Answer - A | |
| 86. |
A women with normal vision marries a man with normal vision and gives birth to a colourblind son. Her husband dies and she marries a colourblind man. Wht is the probability of heer children having the abnormality :-A. `50%` colourblins sons + `50%` colourblind daughtersB. All sons colourblind & daughter carrierC. All daughter colourblind & sons normalD. `50%` sons colourblind and all daughters normal |
| Answer» Correct Answer - A | |
| 87. |
A colourblind man marries a woman with normal vision. The offspring will beA. All colourblindB. All daughters normal and all son will be colourblindC. All normalD. All dughters will be colourblind and all sons will be normal |
| Answer» Correct Answer - B | |
| 88. |
Which of the following symbols and its representation is correct :-A. B. C. D. |
| Answer» Correct Answer - D | |
| 89. |
The presence of recessive trait in a large population is be `16%` the frequency of dominant trait in that population is :-A. `0.84`B. `0.42`C. `0.56`D. `0.96` |
| Answer» Correct Answer - A | |
| 90. |
Which of the following genotype represent intersex Drosophila :-A. `2A+XXX`B. `2A+XXY`C. `3A+XXY`D. `2A+XY` |
| Answer» Correct Answer - C | |
| 91. |
If X/A Ratio of two Drosophila is `0.6 and 0.33` respecively what would be their sex :-A. Female & maleB. Super female & super maleC. Inter sex & super maleD. Inter sex and super female |
| Answer» Correct Answer - C | |
| 92. |
In Drospophila sex index of super female is :-A. 1B. `0.5`C. `1.5`D. `0.67` |
| Answer» Correct Answer - C | |
| 93. |
Sex determination in jumans takes place by :-A. sex chromosomes of fatherB. measurement of spermC. measurement of ovumD. sex chromosomes of mother |
| Answer» Correct Answer - C | |
| 94. |
The machanism of sex determination in birds shows :-A. Male heterogametyB. Both heterogameticC. Female heterogametyD. Both homohametic |
| Answer» Correct Answer - C | |
| 95. |
An individual with two identical members of a pair of genetic factors is called :-A. HeteromorphicB. heterozygoteC. homomorphicD. homozygote |
| Answer» Correct Answer - D | |
| 96. |
In case of ABO blood grop allele `I^(A)and I^(B)` if present together then-A. Only `I^(A)` allele expressesB. Only `I^(B)` allele expressesC. Both `I^(A) and I^(B)` alleles expressD. None of these |
| Answer» Correct Answer - C | |
| 97. |
When a red flower homozygous pea plant is crossed with a white flower plant what colour is produced in `F_(1)` :-A. RedB. WhiteC. PinkD. Red + white |
| Answer» Correct Answer - A | |
| 98. |
When two different genotype produce the same phenotype due to environmental difference, then each one is known as :-A. PhenotypeB. PhenocopyC. ProgenyD. Independent offspring |
| Answer» Correct Answer - B | |
| 99. |
The genotype of a plant showing the dominat phenotype can be determined by :A. Pedigree analysisB. Back crossC. Test crossD. Dihybrid cross |
| Answer» Correct Answer - C | |
| 100. |
Point (Gene mutation) mutation invlvesA. DelectionB. InsectionC. Change insingle base pairD. Duplication |
| Answer» Correct Answer - C | |