InterviewSolution
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InterviewSolution
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. |
The graphical representation to calculated the probability of all possible genotypes of offspring in a genetic cross was developed by:A. KornbergB. Gregor MendelC. Geoge GamowD. Reginald C. Punnett |
| Answer» Correct Answer - D | |
| 52. |
In a monohybrid cross between two heterozygous individuals, the number of pure homzygous individuals obtained in `"F"_(1)` generation is:A. 2B. 4C. 6D. 8 |
| Answer» Correct Answer - A | |
| 53. |
Mendel was successful in discovering the principles of inheritance asA. He was a famous mathematicianB. He took pea plants for his experimentsC. He had an in-depth knowledge on hybridisationD. He did not encounter linkage between the ganes for the characters he considered |
| Answer» Correct Answer - D | |
| 54. |
In Mendelian dihybrid cross when heterozygous Round Yellow are self crossed, Round Green offsprings are represented by the genotype:A. rrYy, rrYYB. RRyy, RryyC. RrYy, rryy, RryyD. Rryy, Rryy, rryy |
| Answer» Correct Answer - B | |
| 55. |
Emasculation is a part of:A. hybridizationB. mass selectionC. clonal selectionD. pure line selection |
| Answer» Correct Answer - A | |
| 56. |
What is not true about emasculation of a flower white performing an artificial cross?A. It is done before anthesis.B. It is to avoid self pollination.C. It is removal of anthers from flower.D. It is done in flowers of plants selected as male parent. |
| Answer» Correct Answer - D | |
| 57. |
A true breeding plant is:A. one that is able to breed on its own.B. near homozygous and produces offspring of its own kind.C. always homozygous recessive in its genetic constitution.D. produced due to cross-pollination among unrelated plants. |
| Answer» Correct Answer - B | |
| 58. |
Match the terms in column I with their description in column II and choose the correct option: `{:(,"Column I",,"Column II"),("A","Dominance",(i),"Many genes govern a single character"),("B","Codominance",(ii),"In a heterogygous organism only one allele expresses itself"),("C","Peiotropy",(iii),"In a heterozygous organism both alleles expresss themselves fully"),("D","Polygenic inheritance",(iv),"A single gene influences many characters"):}`A. `{:(,"A",,"B",,"C",,"D"),((a),"(iv)",,"(i)",,"(ii)",,"(iii)"):}`B. `{:(,"A",,"B",,"C",,"D"),((b),"(iv)",,"(iii)",,"(i)",,"(ii)"):}`C. `{:(,"A",,"B",,"C",,"D"),((c),"(ii)",,"(i)",,"(iv)",,"(iii)"):}`D. `{:(,"A",,"B",,"C",,"D"),((d),"(ii)",,"(iii)",,"(iv)",,"(i)"):}` |
| Answer» Correct Answer - D | |
| 59. |
Gens that are present on the same chromosome are called:A. linearB. syntenicC. synapticD. none of these |
| Answer» Correct Answer - B | |
| 60. |
How many phenotypes will be obtained from a test cross of AaBbCc?A. 4B. 16C. 8D. 32 |
| Answer» Correct Answer - C | |
| 61. |
If individuals of genotype AaBbCc are intercrossed, how many different phenotypes can occur in their progeny?A. 3B. 8C. 6D. 16 |
| Answer» Correct Answer - B | |
| 62. |
The procedure adopted by Mendel which was different from his predecessors in:A. keeping breeding recordsB. quantitative analysis of dataC. differentiating inherited traitsD. employing many traits at one time |
| Answer» Correct Answer - B | |
| 63. |
The ratio of 9:3:3:1 is due toA. segregation of charactersB. crossing over of chromosomesC. independent assortment of genesD. homologous pairing between chromosomes |
| Answer» Correct Answer - C | |
| 64. |
The ratio of `9 : 7` is due to:A. lethal genesB. supplementary genesC. epistatic genesD. complementary genes |
| Answer» Correct Answer - D | |
| 65. |
Law of Mendel which is not completely applicable is:A. co-dominanceB. law of dominanceC. law of segregationD. law of independent assortment |
| Answer» Correct Answer - D | |
| 66. |
Independent assortment of genes does not take place when:A. genes are located on homologous chromosomesB. genes are linked and located on the same chromosomeC. genes are located on nonhomologous chromosomesD. all of the above |
| Answer» Correct Answer - B | |
| 67. |
Two or more independent genes present on different chromosomes which determine nearly same phenotype are calledA. epistasisB. polygeneC. complementary genesD. non-complementary genes |
| Answer» Correct Answer - C | |
| 68. |
In human beings, multiple genes are involved in the inheritance of:A. skin colourB. phenylketonuriaC. colour blindnessD. sickle-cell anaemia |
| Answer» Correct Answer - A | |
| 69. |
Independent assortment means:A. separation of parental charactersB. segregation of parental charactersC. recombination of parental charactersD. non-separation of parental characters |
| Answer» Correct Answer - C | |
| 70. |
which genotype represents a true hybrid condition?A. TTrrB. TtRrC. TTRrD. ttrr |
| Answer» Correct Answer - B | |
| 71. |
Which of the following points further strengthened Mendelism?A. Law of independent assortment which was based on monohybrid crossB. Law of independent assortment which could be stated on the basis of segregation of gametesC. Incomplete dominance gave a new way to MendelismD. A character controlled by a pair of unit factors |
| Answer» Correct Answer - B | |
| 72. |
The genes controlling the seven pea characters studied by Mendel are now known to located on how many different chromosomes?A. FourB. SevenC. FiveD. Six |
| Answer» Correct Answer - A | |
| 73. |
Skin colour of human beings is determined by cumalative genes. This hypothesis was origanally proposed by:A. SuttonB. CorrensC. BatesonD. Davenport |
| Answer» Correct Answer - D | |
| 74. |
Mendelian recombinations are due to:A. mutationB. pleiotrophyC. crossing overD. independent assortment |
| Answer» Correct Answer - D | |
| 75. |
A dihybrid plant on self pollination, produced 400 phenotypes with 4 types of genotype. How many seeds will have genotype TtRr?A. 50B. 150C. 200D. 100 |
| Answer» Correct Answer - D | |
| 76. |
Had Mendel decided to study those traits together which are determined by linked genes, he would not have found out:A. dominanceB. crossing overC. principle of segregationD. principle of independent assortment |
| Answer» Correct Answer - D | |
| 77. |
Probability of genotype TTrr in `"F"_(2)` generation of a dihybrid cross is:A. `1//16`B. `3//16`C. `9//16`D. `6//16` |
| Answer» Correct Answer - A | |
| 78. |
An individual heterozygous for two alleles (CcDd) produce one million sperms, how many of the sperms will have both dominant alleles?A. 1 millionB. 0.50 millionC. 0.25 millionD. 0.75 million |
| Answer» Correct Answer - C | |
| 79. |
Alleles are:A. different molecular forms of a geneB. true breeding homozygotesC. different phenotypeD. heterozygotes |
| Answer» Correct Answer - A | |
| 80. |
when different alleles of the same gene are present in an individual, it is a:A. diploidB. mosaicC. homozygousD. heterrozygous |
| Answer» Correct Answer - D | |
| 81. |
An organism with two identical alleles for a given trait is:A. dominantB. homozygousC. segregatingD. heterozygous |
| Answer» Correct Answer - B | |
| 82. |
Segregation of Mendelian factors (no linkage no crossing over) occurs during:A. dipoteneB. anaphase IC. metaphase ID. anaphase II |
| Answer» Correct Answer - B | |
| 83. |
Pure line breed refers to:A. homozygosity onlyB. heterozygosity onlyC. heterozygosity and linkageD. homozygosity and independent assortment |
| Answer» Correct Answer - A | |
| 84. |
Multiple allelism is observed in:A. Haemophilia in manB. Sex determination in birdsC. ABO blood typesD. Flower colour in Snapdragon |
| Answer» Correct Answer - C | |
| 85. |
If the frequency of a recessive phenotype is a stable population is 25%, the frequency of recessive allele in the population would be:A. 0.75B. 0.5C. 0.375D. 0.25 |
| Answer» Correct Answer - B | |
| 86. |
In humans, freckles is dominant over no freckles. A man with freckles marries a woman having freckles, but the children have no freckles. What chances did each child have for freckles?A. 0.25B. 0.5C. 0.75D. 1 |
| Answer» Correct Answer - C | |
| 87. |
In fruits flies, `L` = long wings and `l` = short wings. The offsprings exhibit a `1:1` ratio when a long-winged fly is crossed with short-winged fly. What is the genotype of parents?A. `Ll, Ll`B. `LL,Ll`C. `Ll,LL`D. `Ll,ll` |
| Answer» Correct Answer - D | |
| 88. |
In a dihybrid cross `"F"_(2)` ratio of 15 : 1 is due to:A. duplicate genesB. recessive epistasisC. dominant epistasisD. supplementary genes |
| Answer» Correct Answer - A | |
| 89. |
Supplementary gene interaction in `"F"_(2)` results in a phenotypicc ratio:A. `9 , 7`B. `12 : 3 : 1`C. `9 : 3 : 4`D. `12 : 1 : 3` |
| Answer» Correct Answer - C | |
| 90. |
Select the statement which is not correct?A. height, weight, skin colour are polygenicB. polygenic character is controlled by multiple genesC. polygenic character is controlled by multiple allelesD. in case of polygenic inheritance thousands of intermediate phenotypes are found between two extreme ones |
| Answer» Correct Answer - B | |
| 91. |
Polygenic inheritance shows:A. different genotypesB. different phenotypesC. Both of theseD. none of these |
| Answer» Correct Answer - C | |
| 92. |
Which one is an interaction of genesA. PleiotropyB. EpistasisC. DominanceD. Recessiveness |
| Answer» Correct Answer - B | |
| 93. |
In the ABO blood typing system, which of the following progeny are not possible?A. an O child from a mating of two A individualsB. an O child from a mating of an A and O individualC. an AB child from a mating of an A and O individualD. an A child from a mating of an AB individual to a B individual |
| Answer» Correct Answer - C | |
| 94. |
Genes whose combined action affects one particular character are known as:A. polygenesB. oncogenesC. dominant genesD. pleiotropic genes |
| Answer» Correct Answer - A | |
| 95. |
Mendel chose pea plants because they:A. were cheapB. were easily availableC. have great economic importanceD. were having contrasting characters |
| Answer» Correct Answer - D | |
| 96. |
Mating between two individuals differing in genoutope to produce genetic variation is calledA. mutationB. intoductionC. hybridizationD. domestication |
| Answer» Correct Answer - C | |
| 97. |
When cross is made between two species of the same genus, then the cross is known as:A. intraspecific hybridizationB. interspecific hybridizationC. intergeneric hybridizationD. intervarietal hybridization |
| Answer» Correct Answer - B | |
| 98. |
A character expressed in hybrid isA. recessiveB. dominantC. co-dominantD. epistatic |
| Answer» Correct Answer - B | |
| 99. |
Cross between unrelated group of organisms is calledA. hybridB. heterosisC. test crossD. back cross |
| Answer» Correct Answer - A | |
| 100. |
In the garden pea, round seeds are dominant over wrinkled seeds. An investigator crosses a plant having round seeds with a plant having wrinkled seeds. He counts 400 offspring. How many of the offspring have wrinkled seeds if the plant having round seeds is a heterozygote?A. 200B. 250C. 300D. all 400 |
| Answer» Correct Answer - A | |