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.
| 201. |
Genes are located on :A. ribosomesB. lysosomesC. CentrosomesD. chromosomes |
| Answer» Correct Answer - D | |
| 202. |
The linkage map of X-chromosome of fruit fly has 66 units with yellow body gene Y at one end and bobbed hair B gene at he other end. The recombination frequency between these two genes Y and B should beA. lt50%B. 1C. 0.66D. gt 50% |
| Answer» Correct Answer - C | |
| 203. |
Tow dominant nonallelic genes are 50 map units apart.The linkage isA. Cis typeB. Trans typeC. CompleteD. Absent/Incomplete |
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Answer» Correct Answer - D Both dominant genes on the same chromosome is cis -arrangement .At 50 map units cis is regularly changed to trans and vice versa, so that no fixed linkage can be present |
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| 204. |
A person having klinefelter,s syndrome is charcterised byA. Male with some secondary sexual characters of femaleB. Female with some secondary sexual characters of maleC. Having both male and females sex organsD. Female internal sex organs and male external sex organs |
| Answer» Correct Answer - A | |
| 205. |
One of the parents of a cross has a mutation in its mitochondiria. In that cross, that parent is taken as a male. During segregation of `F_(2)` progenies that mutation is found inA. fifty per cent of the progeniesB. one -third of the proggeniesC. none of the progeniesD. all the progenies |
| Answer» Correct Answer - C | |
| 206. |
One of the parents of a cross has mutation in mitochondria. In that cross, that parent is taken as a male. During segregation of `F_(2)`-progenies that mutation is found inA. One -third of the progeniesB. None of the progeniesC. All of the progeniesD. 50% of the progenies |
| Answer» Correct Answer - C | |
| 207. |
Which of the chromosomal formulation is responsible for the expression of meta-male character in Drosophila ?A. 2A+3XB. 3A+3XC. 3A+3XD. 3A+XY |
| Answer» Correct Answer - A | |
| 208. |
Assertion: According to Bridges, the Y-chromosome is responsible only for the fertility of sex and not for sex determination in Drosophila.Reason: According to Bridges in Drosophila, autosomes are responsible for feminine characteristics.A. Both Assertion and reason are true and the reason is a correct explanation of the AssertionB. both Assertion and Reason are true and the Reason is not the correct explanation of the AssertionC. Assertion is true, but the Reason is falseD. Assertion is false, but the reason is true |
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Answer» Correct Answer - C i. According to Bridges, autosomes are responsible for masculine characteristics. While X-chromosomes determine the feminine characteristics. |
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| 209. |
According to genic balance theory, which was given by CB Bridges, the sex of Drosophila is determined byA. ratio between the number of Y- chromosomes and complete set of autosomesB. Ratio between the number of X- chromosomes and complete set of autosomesC. Both (a) and (b)D. None of the above |
| Answer» Correct Answer - B | |
| 210. |
point mutaations is a change which involes :A. loss of a geneB. addition of a geneC. change in a segment of geneD. deletion of a segment of gene |
| Answer» Correct Answer - C | |
| 211. |
Crossing over takes place between :A. two non homologous chromosomesB. two homologous chromosomesC. two chromosomesD. None of the above |
| Answer» Correct Answer - B | |
| 212. |
Which of the following mechanisms can explain the determination of sex?I. Genic balance mechanismII. Haplodiploidy mechanismIII. Cytoplasmic inheritanceIV . Sex-linked inheritanceA. I and IIB. III and IVC. Only IVD. I,II and III |
| Answer» Correct Answer - A | |
| 213. |
Process of genetic mutation isA. ReversibleB. IrreversibleC. Partially reversibvleD. Continuous. |
| Answer» Correct Answer - D | |
| 214. |
crossing over involes :A. Duplication of chromosomesB. exchange of genetic materialC. addition of chromosomesD. deletion of chromosomes |
| Answer» Correct Answer - B | |
| 215. |
Genic blance of sex determination was proposed byA. BridgesB. MendelC. BalbianiD. Morgan |
| Answer» Correct Answer - A | |
| 216. |
Crossing over produces:A. synapsis of linked genesB. linkages of dominant genesC. expression of recessive genesD. recombination of linked genes |
| Answer» Correct Answer - D | |
| 217. |
Twenty third pair of human chromosomes are known asA. AutosomesB. HetersomesC. ChromatidsD. Chromosomes |
| Answer» Correct Answer - B | |
| 218. |
phenomemon of crossing over in diploid organisiums is responsible for :A. recombination of linked genesB. segregataion between genesC. linkages between genesD. dominance of gene |
| Answer» Correct Answer - A | |
| 219. |
A condition of bnot having exact multiple of haploid set isA. AneuploidyB. SynploidyC. PolylpoidyD. All the above |
| Answer» Correct Answer - A | |
| 220. |
Tay sach s disease is due toA. Sex linked recessive geneB. Sexlinked dominant geneC. Autosomal dominant geneD. Autosomal rescessive gene |
| Answer» Correct Answer - D | |
| 221. |
The genes which seem to behave like alleles and have minimum chances of crossing over are calledA. IsoallelesB. PseudoallelesC. Both (a) and (b)D. Multiple alleles |
| Answer» Correct Answer - D | |
| 222. |
A colourblind man marries a woman with normal vision. The offspring will beA. All sons colourblindB. All doughters colour blindC. Both A and BD. All sons and soughters normal but doughters are carriers |
| Answer» Correct Answer - D | |
| 223. |
the phenomenon permitting exchaange of chromosome segments is called :A. LinkageB. mutationC. segregationD. crossing over |
| Answer» Correct Answer - D | |
| 224. |
Crossing over result inA. Recombination between linked genesB. Linkages between genesC. Segregation of genesD. Dominacne of genes. |
| Answer» Correct Answer - A | |
| 225. |
Three genes a b c show crossing over 20% between a and b, 28% between b and c and 8% between a and c. Swquence of genes will beA. bacB. abcC. acbD. None of the above |
| Answer» Correct Answer - A | |
| 226. |
The function of crossing over isA. Segregation of allelesB. Recombination of allelesC. Segregation of chromosomesD. Distribution of linked genes. |
| Answer» Correct Answer - B | |
| 227. |
Determination of percentage of crossing over between two linked genes is important inA. Maintaining heterozygosity in poplulationB. Indication relative position of genes in chromosomesC. Fixation of heterosos in organismsD. Explaining the phenomenon of coupling and replusion |
| Answer» Correct Answer - B | |
| 228. |
Alleles of different genes found on same chromosame may be sepaeted by:A. epistasisB. pleiotrophyC. crossing overD. continuous variation |
| Answer» Correct Answer - C | |
| 229. |
Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized the `F_(2)` segregation will showA. Higher number of the recombinant typesB. segregation is expected in 9: 3:3:1 rateC. Secgregation in 3:1 ratioD. Higher number of parental types |
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Answer» Correct Answer - D F2- segregation will whow higher number of parental types. When two genes are linked than the recombinantion frequency is less and there is higher number of parental types. |
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| 230. |
maize with 10 pairs of chromosomes has linkage group:A. 5B. 10C. 20D. 40 |
| Answer» Correct Answer - B | |
| 231. |
crossing over may result in toA. Gene mutationB. Genomatic mutationC. Genetic recombinationD. None of the above |
| Answer» Correct Answer - C | |
| 232. |
Maize has 10 pairs of chromosomes.How many linkage groups does it have ?A. 20B. 10C. 5D. 40 |
| Answer» Correct Answer - B | |
| 233. |
Linkage in Drosphila was first discoveredA. BridgesB. MendelC. Bateson and PunnetD. Morgan |
| Answer» Correct Answer - D | |
| 234. |
In gene mutation adenine is replaced by guanine .It is known asA. SubstitutionB. point mutationC. TransitionD. Transversion |
| Answer» Correct Answer - C | |
| 235. |
Alkaptonurics excreate excess ofA. UrineB. AlbumenC. Malony caetic acidD. Homogentisic acid |
| Answer» Correct Answer - D | |
| 236. |
If the DNA condons are ATG ATG ATG and a cytosine base is inserted at the beginning , which of the following will resultA. CA TGA TGA TGB. C ATG ATG ATGC. CAT GAT Gat GD. A nonsense mutation |
| Answer» Correct Answer - C | |
| 237. |
In transversion :A. Purine is replaced by another purineB. Purine is replaced by pyrimidine or vice versaC. Some nitrogen bases are eliminated from a geneD. Some nitrogen bases are added in a gene |
| Answer» Correct Answer - B | |
| 238. |
Replacement of purrine base by another purine base is called :A. somatic mutationB. addition mutationC. Deletion mutationD. substition mutation |
| Answer» Correct Answer - D | |
| 239. |
In transversion :A. pyrimidine is replaced by pyrimidineB. purine is replaced by pyrimidineC. purine is replaced by purineD. None of the above |
| Answer» Correct Answer - B | |
| 240. |
which of the following mutagens increases disture between the neighbouring `N_(2)` base -pairs (from 3.4 A to 6.8 A ) and causes frameshift mutation ?A. proflavinonB. 5- BromourcilC. 2- A minopurineD. Methane sulfonate |
| Answer» Correct Answer - A | |
| 241. |
Frameshift mutation occurs when :A. Base is addedB. Base is deletedC. Base is added or deletedD. None of the above |
| Answer» Correct Answer - C | |
| 242. |
which of the following will causes a more effecticve muta -tion ?A. One codonB. one base delationC. Base subsititionD. Base seamintion |
| Answer» Correct Answer - B | |
| 243. |
Frameshift mutation occurs when :A. base is addedB. base is deletedC. base is added or deletedD. anticodons are not present |
| Answer» Correct Answer - C | |
| 244. |
A segment of DNA has a base sequence AAG GAG GAC CAA CCA, which of the folllowing sequenous AAG GAG sents a framesshift mutation ?A. AGG AGG ACC AAC CAB. AAG GCG GAC CCA ACC. ACG GAC GAC CAG CCAD. AAG GAG GAC CAA CCA |
| Answer» Correct Answer - A | |
| 245. |
A mutation that changes a codon specifying one amino acid to a termination codon is called aA. Mis-sense mutationB. transition mutationC. Non-sense mutationD. Frameshift mutation |
| Answer» Correct Answer - C | |
| 246. |
A mutation that change a codon specifying one amino acid to a termination that changes a codon is called:A. reverse mutationB. mis-sence mutationC. nonsence mutationD. framesshift mutation |
| Answer» Correct Answer - B | |
| 247. |
A point mutation that changes a codon specifying an amino acid into a stop condon is called aA. Non-sence mutationB. Deletion mutationC. frameshift mutationD. mis-sence mutation |
| Answer» Correct Answer - A | |
| 248. |
Which of these statement represent reason for silent mutations? I. more than one codon specify same amino acid. II.Simultaneous presence of suppressor mutations. III. The chang in codon. IV.Prsence of activator genes Choose the correct option.A. I,II and IIIB. II and IVC. III and IVD. I and I II |
| Answer» Correct Answer - A | |
| 249. |
A mutation that change a codon spcifying one amino acid to a terination that changes a codon is called:A. Mis-sence mutationB. transition mutationC. nonsence mutationsD. framesshift mutation |
| Answer» Correct Answer - C | |
| 250. |
The change in single base pairA. results in new speciesB. always alter protein funcationC. always cause amino acid replacementD. does not necessarily change the phoentype |
| Answer» Correct Answer - D | |