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.
| 151. |
The concept of genetic/chromosomal basis of sex-determination was observed inA. Evening primroseB. BirdsC. HumansD. Insects |
| Answer» Correct Answer - D | |
| 152. |
The scientist who first discorved cytoplasmic inheritance wasA. CorrensB. RhoadesC. MendelD. Morgan |
| Answer» Correct Answer - A | |
| 153. |
A chromosome with sub terminal centromere isA. AcentricB. AcrocentricC. MetacentricD. Telocentric |
| Answer» Correct Answer - B | |
| 154. |
Cytoplasmic inheritance is due toA. PlastidsB. MitochondriaC. Cytoplasmic particlesD. Cytoplasms |
| Answer» Correct Answer - D | |
| 155. |
Kappa particles are present inA. PlastidsB. MitochondriaC. PlasmidsD. Cytoplasms |
| Answer» Correct Answer - D | |
| 156. |
Kappa particles make an animal killer when their number in an individual isA. 6B. 60C. 400D. 150 |
| Answer» Correct Answer - C | |
| 157. |
A point mutation comprising the dubsition of a purine by a pyrimidine is called :A. DeletionB. transtionC. TransvertionD. Translocation |
| Answer» Correct Answer - C | |
| 158. |
Which one of the following techniques is employed in human genetic counselling ?A. Serological techniqueB. PolyploidyC. Pedigree analysisD. Amniocentesis |
| Answer» Correct Answer - C | |
| 159. |
Work of Beadle and tatum on Neursopora crssa proved that :A. every gene is responsible for specific enzymesB. replication of DNA is semiconservaativeC. viruses have genetic materialD. plant cells are totipotent |
| Answer» Correct Answer - A | |
| 160. |
Beadle and Tatum showed that each kind of mutant bread mould they studied lacked a specific enzyme.Their experiments demonstrated thatA. genes ar mode of DNAB. enzymes are required to repair damageC. genes carry information for making proteinD. cells need specific enzymes in order to function |
| Answer» Correct Answer - C | |
| 161. |
Statement (s) Nondisjunction is the failure of paired chromosomes to segreagate during the metaphase of meiotic division of fametogenesis Reason (R ) Non disjunction results in production of abnormal gametesA. Both S and R are true but R is not correct explanation of SB. Both S and R are true and R is correct explanation ofSC. S is correct, R is wrongD. S is wrong and R is correct. |
| Answer» Correct Answer - A | |
| 162. |
The segment of `DNA` which acts as the instrumental manual for the synthesis of the protein is:A. geneB. riboseC. nucleosideD. nucleotide |
| Answer» Correct Answer - A | |
| 163. |
Which one is an example of cytoplasmic inheritance ?A. Plastid inheritanceB. Kappa particle inheritanceC. singma particle inheritanceD. Female sterility in maize |
| Answer» Correct Answer - D | |
| 164. |
Different species of rhododenron have somatic chromosome numbers of 26, 39, 52,78, 104 and 156. By what means does evolution appear to be taking place in this genus?A. AneuploidyB. HyperploidsC. EuploidyD. Autoalloploidy |
| Answer» Correct Answer - C | |
| 165. |
A Drosophila has XXXXYY sex chromosomes. All the autosomal chromosomes are normal . The sexual phenotype will beA. Normal femaleB. super femaleC. IntersexualD. Male |
| Answer» Correct Answer - B | |
| 166. |
XY sex chromosomes were discovered byA. Gregor johann mendelB. M.J.D whiteC. Nettie stevensD. Robert Brown |
| Answer» Correct Answer - C | |
| 167. |
Two gens situated very close on the chromosome showA. High crossing over is detectedB. No crossing overC. Only double cross over can occurD. one crossing over |
| Answer» Correct Answer - B | |
| 168. |
A chromosome, in which the centromere is situated is situated close to its end so that one arm is very short and other vey long isA. MetacentricB. AcrocentricC. TelecentricD. Submetacentric |
| Answer» Correct Answer - B | |
| 169. |
Genetic identity of a human male is determined byA. nucleoliB. autosomesC. cell organellsD. sex chromosomes |
| Answer» Correct Answer - D | |
| 170. |
Male XX and female XY sometime occur due to :A. DeletionB. Transfer of segments in X and Y -chromosomesC. AneuploidyD. Hormonal imbalance |
| Answer» Correct Answer - B | |
| 171. |
Failure of separation of sister chromatuds usA. FusionB. NondisjucntionC. ComplementationD. Interference |
| Answer» Correct Answer - B | |
| 172. |
Which is used as mitotic spindle poisonA. `Ca^(2+)`B. `Mg^(2+)`C. TubulinD. Colchincine |
| Answer» Correct Answer - D | |
| 173. |
During cell division , the process that causes failure of separation of sister chromatids is calledA. CoincidenceB. YinterfernceC. NondisjuctionD. Complementation |
| Answer» Correct Answer - C | |
| 174. |
The relationship between the behaviour of chroosomes and the behaviour of Mensellian factors was first recognized By W.s Sutton and T. Boveri in:A. 1902B. 1890C. 1869D. 1938 |
| Answer» Correct Answer - A | |
| 175. |
In multi-factorial inheritanceA. Many characters are influenced by a simple geneB. Many genes influence a simple characterC. More than one allele ofa gene is necessary to produce the effectD. One gene incompletely dominates the effect of its allele |
| Answer» Correct Answer - B | |
| 176. |
Sutton and Boveri argued that the pairing and separation of a pair of chromosomes would lead toA. The segregation of a pair of a pair of factors they carriedB. The segregation of the charactersC. Recombination of the factors they carriedD. Both (b) and (c) |
| Answer» Correct Answer - A | |
| 177. |
A species or type of a plant derived from doubling the chromosome of F1 hybrid of two similar species is known asA. AutopolyploidB. AmphidiploidC. autodiploidD. Hexaploid |
| Answer» Correct Answer - A | |
| 178. |
Application of colchicine to a vegetative bud of a homozygous tall diploid tomato plant (DD) caused development ofa tetraploid branch. What is the genotype of the somatic cells of this branch?A. DDDB. DDDDC. DDddD. DdDd |
| Answer» Correct Answer - B | |
| 179. |
Haploids are able to express both recessive and dominant alleles /mutations because there are :A. Many alleles for each geneB. Two alleles for each geneC. Only one allele for each gene in the inindividualD. Only one allele in a gene |
| Answer» Correct Answer - C | |
| 180. |
In the context of evolution, what is the most important source of new mutations?A. Exposure to X-rayB. Exposure to chemicalsC. The mispairing of chromosomes during meiosisD. Errors during DNA replicatin |
| Answer» Correct Answer - D | |
| 181. |
Microorganisms have been very useful in elucidating different effects of the mutations becauseA. They have short lifespan and many generations may be studied within a limited periodB. They are haploid and therefore, express all the mutations induced in themC. they can be easily cultured under controlled condition on simple and defined mediaD. All of the above |
| Answer» Correct Answer - D | |
| 182. |
Mutations which normally happen randomly are considered one of the materials for evolution because theyA. Contribute to new variation in organismB. cause death of organismC. are stableD. none of the above |
| Answer» Correct Answer - A | |
| 183. |
Aneuploidy is :A. n-1B. 3nC. 2n-1D. n+1 |
| Answer» Correct Answer - C | |
| 184. |
physical association of genes on a chromosomes is called :A. RepulsionB. LinkageC. AneuploidyD. Duplication |
| Answer» Correct Answer - B | |
| 185. |
Mutation refers to sudden change inA. PhenotypeB. Maturation timeC. Metabolic rateD. Genetic make up |
| Answer» Correct Answer - D | |
| 186. |
Chromosomes are made ofA. DNA+PectinB. RNA+DNAC. DNA+HistonesD. DNA only |
| Answer» Correct Answer - C | |
| 187. |
Aneuploidy is zygotic chromosome numberA. Thrice of ganmetic numberB. Twice of gmetic numberC. Quardruple of ganmetic numberD. Abnormal |
| Answer» Correct Answer - D | |
| 188. |
Mutation is a change that isA. change in gene frequencyB. genetic driftC. change in base paires in DNA moleculeD. Environmental mechanism of evolution |
| Answer» Correct Answer - C | |
| 189. |
Euploidy isA. One chromosome more than haploid setB. One chromosome more than diploid setC. One chromosome less than haploid setD. Exact multiple of haploid set of chromosomes |
| Answer» Correct Answer - D | |
| 190. |
The variation in chromosome structure occurs due to I.DuplicationII. EuploidyIII. InversionIV. AneuploidyA. I and IIIB. II and IVC. III and IVD. Only IV |
| Answer» Correct Answer - A | |
| 191. |
A mutation in DNA molecule involving the replacement of one nucleotide base pair with another is called a :A. TranposonB. Point mutationC. Deletion mutationD. Frameshift mutation |
| Answer» Correct Answer - B | |
| 192. |
When a mutation is limited to the substitution of one nucleotide pair of DNA, it is called asA. TranslocationB. Point mutationC. Sugar phosphate deletionD. Base inversion |
| Answer» Correct Answer - B | |
| 193. |
When a mutation is limited to be the substiution of one nucleotide for another, it is calledA. Base inveersionB. Point mutationC. TranslocationD. Frme shift mutation |
| Answer» Correct Answer - B | |
| 194. |
When a mutation is limited to be the substiution of one nucleotide for another, it is calledA. FramesehiftB. transversionC. point mutationD. base inversion |
| Answer» Correct Answer - C | |
| 195. |
Euploidy is best explained byA. Exact multiple of a haploid set of chromosomesB. One chromosome less than the haploid set of chromosomesC. One chromosome more than the haploid set of chromosomeD. One chromosome more than the diploid set of chromosomes |
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Answer» Correct Answer - B Euploidy is a nurmal state having balanced number of chromosome, that is an exact multiple of the haploid set, e.g.if a haploid number is 5 then euploidy number would be 5,10,15,20 etc. |
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| 196. |
In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes areA. n=7 and x=21B. n=21 and x=21C. n=21 and x=14D. n=21 and x=7 |
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Answer» Correct Answer - B The basic(x) number of chromosomes of hexaploid wheat is 7 and haploid (n) number is 21. |
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| 197. |
Sex determination rato in a organism is given by `(X)/(A)=1.5,` then organism will be :-A. MaleB. FemaleC. Super femaleD. inter sex |
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Answer» Correct Answer - A According to the genic balance theory of sex determination given by Bridges, if the X/A ratio is 1,5, then organism will be super female. |
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| 198. |
When a mutation is limited to be the substiution of one nucleotide for another, it is calledA. TranslocationB. Point mutationC. Base inversionD. Sugar phosphate deletion |
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Answer» Correct Answer - B When heritable alterations occur in a very small segment of DNA molecule, i.e a single ucleotide or nucleotide pair then this type of mutatioon are called point mutations. |
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| 199. |
there are there genes A,B and C percenatage of crossing over between A and B is 20 ,B and C is 28 and A and C is 8. what is sequence of genes on the chromosames ?A. B,A,CB. A,B,CC. A,C,BD. None of these |
| Answer» Correct Answer - A | |
| 200. |
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. 0.66B. `le50`C. `gt50`D. 1 |
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Answer» Correct Answer - C The recombination fequency of y and b gene will be lt 50% |
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