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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.
| 351. |
By which process there is a gain of segment of DNA which results in alteration in chromosome? (a) Insertion (b) Duplication (c) Both (a) and (b) (d) Deletion |
| Answer» Correct Answer - C | |
| 352. |
Sickle cell anaemia is due to mutation ofA. CTC to CACB. CTG to CAGC. CAG to CTCD. CGC to CAC |
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Answer» Correct Answer - A Sickle cell anaemia is due to mutation of CTC to CAC. |
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| 353. |
Chromosomes was seen first time byA. WaldeyerB. FlemmingC. HofmeisterD. Strasburger |
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Answer» Correct Answer - C (c) Hofmeister discovered nuclear filaments in the nuclei of the pollen mother cells of the plant . Tradescantia , in 1848. |
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| 354. |
Chromosomes number isA. Fixed for a speciesB. Fixed for an ecosystemC. Fixed for a communityD. Fixed |
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Answer» Correct Answer - A (a) Chromosome number is fixed for a species . The lowest number is seen in Haplopappas gracilis i.e. 2n = 4 and maximum in ophioglossum species i.e. 2n = 1656 . |
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| 355. |
In man sexlinked characters are mainly transmitted throughA. Y-chromosomeB. AutosomeC. X-chromosomeD. X-chromosome, Y-chromosome and Autosomes |
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Answer» Correct Answer - C (c) Because males have only one X chromosome , Y being without alleles . Therefore , even single recessive allele expresses its effect in males . |
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| 356. |
If a colour blind man marries a woman who is homozygous for normal colour vision,the probability of their son being colour blind is : |
| Answer» Correct Answer - A | |
| 357. |
Which of the following trueA. One gene one proteinB. One gene one polypeptideC. One gene many polypetideD. All of the above |
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Answer» Correct Answer - B (b) According to this theory one gene controls the synthesis of one polypeptide chain and not of the complete enzyme or protein molecule. |
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| 358. |
If a colour blind man marries a woman who is homozygous for normal colour vision,the probability of their son being colour blind is :A. 0.75B. 1C. 0D. 0.3 |
| Answer» Correct Answer - C | |
| 359. |
Different types of chromosomes can be recognised by the position of ht following separating the two armsA. CentromereB. GenesC. SpindleD. Nucleus |
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Answer» Correct Answer - A (a) Based on the location of centromere the chromsomes are categorised in to (i) Telocentric (ii) Acrocentric (iii) Submetacentric (iv) Metacentric . |
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| 360. |
Assertion : Heterochromatin is genetically inactive. Reason. : It lacks genes.A. If both the assertion and the reason are true and the reasons is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reson is falseD. If both the assertion and reason are false |
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Answer» Correct Answer - C Genetic analyses indicate that heterochromatin is largely genetically inactive. Most of the genes of eukaryotes that have been extensively characterized are located in euchromatic region of the chromosomes. The earlier belief that no genes are found in heterochromatic regions is not correct , because genes could be located in heterochromatic region in several cases like Drosophila and tomato. the genes in heterochromatic region perhaps become active for a short period. |
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| 361. |
A true breeding plant is:A. Near homozygous and produces offspring of its own kindB. Always homozygous recessive in its genetic constitutionC. One that is able to breed on its ownD. Produced due to cross-pollination among unrelated plants |
| Answer» Correct Answer - A | |
| 362. |
Which of the following is genetically dominant in manA. Colour blindnessB. Rh positiveC. HaemophiliaD. Albinism |
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Answer» Correct Answer - B (b) The difference between Rh positive and Rh negative depend on a single pair of genes (rr) with the gene responsible for the Rh positive condition dominant (RR, Rr) |
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| 363. |
A true breeding plant is:A. One that is able to breed on its ownB. Produced due to cross-pollination among unrelated plantsC. Near homozygous and produces offspring if its own kindD. Always homozygous recessive in its genetic constiution |
| Answer» Correct Answer - C | |
| 364. |
A true breeding plant is:A. one that is able to breed on its ownB. produced due to cross-pollination among unrelated plantsC. near homozygous and produced offspring of its unrelated plantsD. always homozygous recessive in its genetic constitution |
| Answer» Correct Answer - C | |
| 365. |
In human beings, the colour of skin is controlled byA. Multiple allelesB. Lethal gensC. Polytgenic effectD. None of these |
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Answer» Correct Answer - A (a) The skin colour of a person is the result of an interaction between two pairs of genes . |
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| 366. |
A true breeding plant isA. Always homozygous recessive in its genetic constitutionB. One that is able to breed on its ownC. Produced due to cross pollination among unrelated plantsD. Near homozygous and produces offspring of its own kind |
| Answer» Correct Answer - D | |
| 367. |
Human skin colour is controlled by several gene pairs. Let us assume here that there are just three gene pair on different chromosome and that for each paior there are two alles - an incompletely dominant one that codes for melanin deposition. If a very dark skinned person marries a very light skinned woman, what will be the chance that their offspring will have very dark skin |
| Answer» Correct Answer - A | |
| 368. |
Barr bodies (seen in saliva test in Olympic games) are found in human and are associated withA. Male autosomeB. Female autosomeC. Female sex chromosomeD. Male sex chromosome |
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Answer» Correct Answer - C According to the British geneticist Mary Lyobn (1961), One of two X-chromosomes of a normal female becomes heterochromatic and appers as Barr body . |
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| 369. |
genetic maps of chromosomes are based on the frequency ofA. Non-disjunctionB. TranslocationC. LinkageD. Genetic recombination |
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Answer» Correct Answer - D Genetic maps of chromosomes are based on the frequency of genetic recombination. |
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| 370. |
Genetic maps of chromosomes are based on the frequency ofA. Non-disjunctionB. TranslocationC. DominanceD. |
| Answer» Correct Answer - D | |
| 371. |
The chromosome maps are not accurate maps becauseA. Crossing over frequency is higher than recombination frequencyB. One crossing over interferes and increases the frequency of nearby crossing overC. Crossing over frequency decreases towards the ends of chromosomeD. Heterochromation increases crossing over |
| Answer» Correct Answer - A | |
| 372. |
Sexual reproduction leads to :A. Genetic recombinationB. PolyploidyC. AneuploidyD. Euploidy |
| Answer» Correct Answer - A | |
| 373. |
Which of the following phenomena leads to variation in DNA ?A. Linkage, mutationB. Recombination , linkageC. Mutation, recombinationD. Aneuploidy, linkage |
| Answer» Correct Answer - C | |
| 374. |
Multiple alleles control inheritance ofA. phenylketonuriaB. colour blindnessC. sickle-cell anaemiaD. blood groups |
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Answer» Correct Answer - D Multiple alleles control inheritance of blood groups in human A, B, O blood group system is found in humans where the allele `I^(A)` for A antigen is codominant with the allele `I^(B)` for the B antigen. Both `I^(A)` and `I^(B)` are completely dominant to the allele `I^(O)`. Hierarchy of dominance relationship is symbolised as `(I^(A) = I^(B)) gt I^(O)`. |
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| 375. |
Multiple alleles are present:A. On non-sister chromatidsB. On different chromosomesC. At different loci on the sme chromosomeD. At the sme locus of the chromosome |
| Answer» Correct Answer - D | |
| 376. |
Multiple alleles control inheritance ofA. Colour blindnessB. Sickle cell anaemiaC. Blood groupD. Phenylketoneuria |
| Answer» Correct Answer - C | |
| 377. |
Sex chromosomes of birds areA. ZZ-ZWB. ZZ-WWC. XX-XYD. XO-XX |
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Answer» Correct Answer - A Sex chromosomes of bird are ZZ-ZW. |
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| 378. |
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)),("(ii)",(iii),(iv),(i)):}`B. `{:("(a)",(b),(c),(d)),("(iv)",(i),(ii),(iii)):}`C. `{:("(a)",(b),(c),(d)),("(iv)",(iii),(i),(ii)):}`D. `{:("(a)",(b),(c),(d)),("(ii)",(i),(iv),(iii)):}` |
| Answer» Correct Answer - A | |
| 379. |
Match the terms in column I with their description in column II and choose the correct option. `{:(,"Column I",,"Column II"),("A.","Dominance",1.,"Many genes govern a single character"),("B.","Codominance",2.,"In a heterozygous organism only one allele expresses itself"),("C.","Pleiotropy",3.,"In a heterozygous organism both alleles express themselves fully"),("D.","Polygenic inheritance",4.,"A single gene influences many characters"):}`A. `{:("A","B","C","D"),(2,3,4,1):}`B. `{:("A","B","C","D"),(4,1,2,3):}`C. `{:("A","B","C","D"),(4,3,1,2):}`D. `{:("A","B","C","D"),(2,1,4,3):}` |
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Answer» Correct Answer - A Dominance-Expression of only one allele in a heterozygous organism. Codominance-Side by side full expression of both alleles. `F_(1)` resembles both parents. Pleiotropy - Single gene can exhibit multiple phenotypic expression, e.g.,Phenylketonuria. Polygenic inheritance-Many genes govern a single character, e.g. Human skin colour. |
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| 380. |
XY sex chromosomes were discovered by :A. Gregor Johann MendelB. M.J.D. WhiteC. Nettie StevensD. Robert Brown. |
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Answer» Correct Answer - C XY sex chromosomes were discovered by Nettie Stevens. |
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| 381. |
Match column I with column II and find the correct answer A. (A) - (5), (B) - (1), (C ) - (4), (D) - (2), (E ) - (3)B. (A) - (5), (B) - (2), (C ) - (4), (D) - (1), (E ) - (3)C. (A) - (6), (B) - (5), (C ) - (3), (D) - (4), (E ) - (2)D. (A) - (2), (B) - (1), (C ) - (3), (D) - (6), (E ) - (5) |
| Answer» Correct Answer - A | |
| 382. |
Which one of the following is not a mutagenA. Ethyl methane sulphonateB. Acetic acidC. Nitrous acidD. Ethylene oxide |
| Answer» Correct Answer - B | |
| 383. |
Genes located on Y-chromosome areA. Mutant genesB. Sex-linked genesC. Autosomal genesD. Holandric genes |
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Answer» Correct Answer - D Genes located on Y-chromosome are Holandric genes. |
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| 384. |
A stong mutagen isA. ColdB. HeatC. WaterD. X-ray |
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Answer» Correct Answer - D X-ray is a strong mutagen. |
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| 385. |
What is true in case of Honey Bee?A. Male diploid, female haploidB. Male diploid, female diploidC. Male haploid, female haploidD. Male haploid, female diploid |
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Answer» Correct Answer - D In case of honey bee, male is haploid and female is diploid. |
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| 386. |
The formation of multivalents at meiosis in diploid organism is dua toA. MonosomyB. InversionC. DeletionD. Reciprocal translocation |
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Answer» Correct Answer - D Multivalents is an association of more than two homologous chromosomes . The number of multivalents depends upon the degree of synapasis and chiasmata formation among similar chromoseme |
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| 387. |
Exchange of segments between non -sister chromatids of homologous chromosomes isA. TranslocationB. InversionC. Crossing overD. Tetrasomy |
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Answer» Correct Answer - A Exchange of segments between non-homologous chromosomes is translocation. |
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| 388. |
The figure shows a homologue (bivalent) pair of chromosomes during meiosis Which one of the following option correctly illustrates the final products of the second meiotic divisonA. B. C. D. |
| Answer» Correct Answer - C | |
| 389. |
When a single gene influences more then one trait it is calledA. Pseudo dominanceB. PleiotropicC. EpistasisD. None of these |
| Answer» Correct Answer - B | |
| 390. |
A marriage between normal visioned man and colour blind woman will produce offspringA. Colour blind sons and `50%` carrier daughtersB. `50%` colourblind sons and `50%` carrier daughtersC. Normal males and carrier daughtersD. Colour blind sons and carrier daughters |
| Answer» Correct Answer - D | |
| 391. |
Polyploidy condition is often seen inA. AnimalsB. HumansC. PlantsD. Birds |
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Answer» Correct Answer - C Polyploidy condition is often seen in plants. |
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| 392. |
Chromosomal disorders are caused due toA. Absence of one of more chromosomesB. Excess of one or more chromosomesC. Abnormal arrangement of one or more chromosomesD. All of the above |
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Answer» Correct Answer - D The chromosomal disorders on the other hand are caused due to absence or excess or abnormal arrangement of one or more chromosomes. It is of 2 types - (i) aneuploidy and (ii) polyploidy/euploidy |
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| 393. |
Which one of the following is an example of polygenic inheritance ?A. Flower colour in Mirabilis jalapaB. Production of male honey beeC. Pod shape in garden peaD. Skin colour in humans |
| Answer» Correct Answer - D | |
| 394. |
A polygenic inheritance in human beings isA. skin colourB. phenylketonuriaC. colour blindnessD. sickle-cell anaemia |
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Answer» Correct Answer - A Human skin colour is controlled by polygenic effect atleast by three separate genes. Skin colour is determined by cumulative genes and this hypothesis was designed by Devenport and Devenport in 1910. |
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| 395. |
Find odd one (w.r.t dominant traits in humans)A. Blue eyesB. Brown eyesC. Free ear lobesD. Myotonic dystrophy |
| Answer» Correct Answer - A | |
| 396. |
Mark th odd one (w.r.t true breeding line)A. Shows the stable trait inheritanceB. Shows expression for few generations onlyC. Undergone continous self-pollinationD. Both (1) & (3) |
| Answer» Correct Answer - B | |
| 397. |
An individual exhibiting both male and female sexual characteristics in the body is known asA. hermaphroditeB. intersexC. gynandromorphsD. bisexual |
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Answer» Correct Answer - C Gynandromorph is typically male in certain portions of the body and typically female in other. The cases of gynandromorphism has been reported in man. Drosophilam, silkworm, bees, butterflies, beetles, etc. |
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| 398. |
A fruitfly exhibiting both male and female traits isA. HeterozygouB. GynandromorphC. HemizygousD. Gynander |
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Answer» Correct Answer - B A fruitfly exhibiting both male and female traits is gynandromorph. |
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| 399. |
Probability of four sons to a couple is :A. `1//4`B. `1//8`C. `1//16`D. `1//32` |
| Answer» Correct Answer - C | |
| 400. |
In third pregnancy of a human couple what will be probability of having a son ? |
| Answer» Correct Answer - `1//2= 50%` | |