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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. |
If a colour bind man marries a woman who is normal but carries this trait, the progeny will beA. All normal females but carrier of the traitB. All moles and `50%` females colour bindC. All femals and `50%` males colour bindD. `50%` males and `50%` females colour bind |
| Answer» Correct Answer - D | |
| 202. |
ABO blood groups in humans are controlled by the gene I. It has three alleles - `I^(A), I^(B)` and i. Since there are three different alleles, six different grnotypes are possible. How many phenotypes can occur?A. ThreeB. OneC. FourD. Two |
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Answer» Correct Answer - C The ABO blood group system has at least 6 genotypes. On the basis of presence or absence of antigens and antibodies, four blood groups (phenotypes) have been differentiated-A, B, AB and O blood group. In ABO blood group system, inheritance of grouping is controlled by a single autosomal gene on chromosome 9 with three major alleles A, B and O (`I^(A) , I^(B)` and `I^(O)`). |
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| 203. |
Rh factor is present inA. All vertebratesB. All mammelsC. All reptilesD. Man and rhesus monkey only |
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Answer» Correct Answer - D Rh factor was first of all reported in RBCs of Macaca rhesus ( rhesus monkey ) by Landsteiner and wiener in 1940. It is found only in man and rhesus monkey and is not reported from other animals. |
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| 204. |
If a man`Rh^(+)` marries a loady `Rh^(-)`, thenA. First child will dieB. First child will surviveC. No child will be bornD. None of these |
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Answer» Correct Answer - B `RH^(-)` woman married with `RH^(+)` man, becomes senstitzed simply by carrying a `Rh^(+)` child within her body . Some of the cells from the embryo may mix into her own blood stream during development . The first child of the parents with this genetic back ground is nearly always normal . |
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| 205. |
Who discovered Rh factorA. HuxleyB. LandsteinerC. Landsteiner and WeinerD. Weiner |
| Answer» Correct Answer - C | |
| 206. |
The problem due to `Rh^(-)` factor arises when the blood two `(Rh^(+) and Rh^(-))` mix upA. In a test tubeB. Through transfusionC. During pregencyD. Both a and c |
| Answer» Correct Answer - D | |
| 207. |
Assertion : Starch synthesis in pea seeds is controlled by one gene. Reason: This gene has two alleles (B and b)A. If both assertion and reasons are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - B Starch synthesis in pea seeds is controlled by one gene. This gene has two alleles (B and b). |
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| 208. |
Assertion : Muatations are necessary for the survial to the species. Reason : Lack of mutation gives a temporary advantage to a species in an uncyhanged environment.A. If both A and R are true and R is the correct explanation of A.B. If both A and R are true and R is not the correct explanation of A.C. If A is true but R is falseD. If both A and R are false |
| Answer» Correct Answer - A | |
| 209. |
In garden pea, starch is synthesised effectively inA. Heterozygous round seeded plantsB. Homozygous round seeded plantsC. Wrinkled seeded plantsD. Pure and hybrid round seeded plants |
| Answer» Correct Answer - B | |
| 210. |
Assertion : Frequency of crossing overs is higher then the observed frequency of recombinatin of traits in the offsprings. Reason : More than one cross over many occur simultaneously between the same chromatids.A. If both A and R are true and R is the correct explanation of A.B. If both A and R are true and R is not the correct explanation of A.C. If A is true but R is falseD. If both A and R are false |
| Answer» Correct Answer - A | |
| 211. |
If one parents has blood group A and the other parents has blood group B, the offsprings have which blood groupA. ABB. OC. BOD. A,B,AB or O |
| Answer» Correct Answer - D | |
| 212. |
What will be possible blood group in children from the parents with B and AB blood groups ?A. A,OB. A,B,AB & OC. A, B, ABD. B, O |
| Answer» Correct Answer - C | |
| 213. |
The probality of a having a child with blood group O to parents with blood groups A and B isA. 4 out of 4B. 3 out of 4C. 2 out of 4D. 1 out of 4 |
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Answer» Correct Answer - D Since the blood groups of parnets are A and B, therefore their genotypes are AO and BO so the possbile genotypes of their children are AO, BO, AB and OO i.e the possible blood group are A, B, AB and O. |
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| 214. |
Parents of blood O and AB cannot have a child of group AB becauseA. Gene O is dominant over gene AB. Gene O is dominant over gene BC. Gene A or B is absent in on of the parentsD. Gene A and B is absent in on of the parents |
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Answer» Correct Answer - D Hetrozygous `I^(A)//I^(B)` individual are blood group AB. Both the A antigen ( product of the `I^(B)` alleles) are produced by them. |
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| 215. |
Person with blood group AB is considered as universal recipient because he hasA. No antigen on RBC and no antibody in the plasmaB. Both A and B antigenes in the plasma but no anitbodiesC. Both A and B antigens on RBC but no antibodies in the plasmaD. Both A and B anitbodies in the plasma |
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Answer» Correct Answer - C Person with blood group AB has both A and B antigens on RBC but no antibodies in the plasma. |
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| 216. |
Blood group and named because of the agglutionogen A and B present inA. PlasmaB. RBCC. WBCD. Platelets |
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Answer» Correct Answer - B Agglutiogen A and B is a specific antigen present normally at surface of R.B.C. |
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| 217. |
With regard to the ABO blood typing sytem, if a man who has type O blood were to have children, what blood types could the children haveA. A or OB. B or OC. AB or OD. A,B,AB or O |
| Answer» Correct Answer - B | |
| 218. |
A person with unknown blood group under ABO system, has suffered much loss in an accident and needs immediate blood trasfusion. His one friend who has a valid certifacte of his own blood type. What would have been the type of blood group of the donor friendA. Type AB. Type BC. Type ABD. Type O |
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Answer» Correct Answer - D The person with blood group O is said to universal donor, because in this , there are no antigens on the surface of RBC. |
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| 219. |
A person with unknown blood group under ABO system, has suffered much loss in an accident and needs immediate blood trasfusion. His one friend who has a valid certifacte of his own blood type. What would have been the type of blood group of the donor friendA. Type BB. Type ABC. Type OD. Type A |
| Answer» Correct Answer - C | |
| 220. |
Down syndrome is one of the most common chromosome abnormalities in humans. It occursA. When there is an extra copy of chromosomes 21B. When there is an extra copy of chromosomes 22C. When there is an extra copy of chromosomes 11D. When there is an extra copy of chromosomes 09 |
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Answer» Correct Answer - A Down syndrome is one of the most common chromosome abnormalities in humans. It occurs when there is an extra copy of chromosome 21. |
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| 221. |
The chromosomes which determine the somatic characters are calledA. Sex chromosomesB. HeterosomesC. AutosomesD. None of these |
| Answer» Correct Answer - C | |
| 222. |
Science which links heridity with enviroments isA. GeneticsB. Gene ecologyC. EcologyD. Ecophysiology |
| Answer» Correct Answer - B | |
| 223. |
Carrier of heridity isA. GeneB. DNAC. ChromosomeD. All the above |
| Answer» Correct Answer - D | |
| 224. |
Genetics recombination occurs throughA. Mitosis and fertilizationB. Mitosis and meiosisC. Meiosis and fertilaztionD. None of the above |
| Answer» Correct Answer - C | |
| 225. |
Why is autopolyploidy termed intraspecific polyploidy and allopolyploidy as interspecific polyploidy Comment. |
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Answer» Autopolyploidy arises by increases in the number of chromosomes sets of the same species. It is, thus, an intraspecific polyploidy. Allopolyploidy on the other hand, developed in a hybrid between two species by doubling of chromosomes sets AB to AABB. it is thus, an interspecific polypliody. |
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| 226. |
Our country has made tremendous progess in the field of food grain production aften green reveolution. What is green revelotution ? How was it achieved ? |
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Answer» Green revolution refers to tremendous increases in food production using high yielding varitites, fertilizers and pesticidies. In India. It was achieved by crossing exported high yielding varities of food grains with local varieties to develop high yielding, diseases resistant varieties in 1960s and 70s under the guidance of scientists |
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| 227. |
Chimera is produced due toA. Somatic mutationsB. Reverse MutationsC. Lethal mutationsD. Pleiotropic mutations |
| Answer» Correct Answer - A | |
| 228. |
Which of the following trait shows transmission from carries female to male progeny ?A. Automosomal dominantB. X-linked recessiveC. Y-linked recessiveD. X-linked dominant |
| Answer» Correct Answer - B | |
| 229. |
Polydactyly in man is due toA. Autosomal dominant geneB. Autosomal recessive geneC. Sex-linked dominant geneD. Sex linked recessive gene |
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Answer» Correct Answer - A Poydactyly or extra fingers is called due to autosomarl dominate gene. |
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| 230. |
Which one of the following mutation partially or fullt reverses the harmful effects of previous mutationA. Indirect suppressionB. Intragenic mutationC. Intragenic mutationD. Suppressor mutation |
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Answer» Correct Answer - D Suppressor mutation totally or partially restores a function lost by a primary mutation and is located at a gentic site different from the primary mutation. |
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| 231. |
Read of following statements and find out the incorrect statement(s). a. Genetics deals with the inheritance, as well as variation of characters from parents to offspring. b. Variation is the process by which characters are passed on from parent to progeny. c. Inheritance is the basis of heredity. d. Inheritance is the degree by which progeny differ from their parents. e. Human knew from as early as 8000-10000 B.C. that one of the causes of variation was hidden in sexual reproductionA. b, d and eB. a, c and eC. b and d onlyD. e only |
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Answer» Correct Answer - A Genetics deals with the inheritance, as well as the variation for characters from parents to offspring. Inheritance is the process by which characters are passed on from parent to progeny, it is the basis of heredity. Variation is the degree by which progeny differ from their parents. Humans knew from as early as 8000-1000 B.C. that one of the causes of variation was hidden in sexual reproduction. |
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| 232. |
The genome of Caenohabditis eigans consists ofA. 3 billion base pair and 30,000 genesB. 180 billion base pair and 13,000 genesC. 4.7 billion base pair and 4,000 genesD. 97 billion base pair and 18,000 genes |
| Answer» Correct Answer - D | |
| 233. |
In the given human hand pedigree which character is represented and what is the probability of disease occurrence in fifth child A. Polydactyly (X-linked recessive disorder ),50%B. Polydactyly (X-linked dominant disorder),50%C. Polydactyly(autosomal recessive disorder), 50%D. Polydactyly (autosomal dominant disorder), 50% |
| Answer» Correct Answer - D | |
| 234. |
Match the terms in Column I with their description in Column II and choose the correct option A. `a(iv), b(iii), c(i), d(ii)`B. `a(ii), b(i), c(iv), d(iii)`C. `a(ii), b(iii), c(iv), d(i)`D. `a(iv), b(i), c(ii), d(iii)` |
| Answer» Correct Answer - C | |
| 235. |
The genotype of a plant showing the dominat phenotype can be determined by :A. Back crossB. Test crossC. Dihybrid crossD. Pedigree analysis |
| Answer» Correct Answer - B | |
| 236. |
The phenomenon of a single gene regulating several phenotypes is called ?A. Multpile allelismB. EpistasisC. Incomplelte domonanceD. Pleiotropism |
| Answer» Correct Answer - D | |
| 237. |
Name the animal in which sex is determined by number of chromosomes. Who produced the first induced mutation |
| Answer» Honeybee. H .J. Muller | |
| 238. |
Exchange of genetic material between chromatids of homologus chromosomes during meiosis is called or Recombination is involved in the process ofA. SynapsisB. ChiasmataC. TransformationD. Crossing over |
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Answer» Correct Answer - D (d) Crossing over is a process by which chromatids of homologous exchange portions of genetic material, usually during tetrad formation of meiosis. Crossing over occurs at pachytene sub stage of prophase I of meiosis but visible at diplotene substage of prophase I. |
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| 239. |
How do the cross over and noncross over chromatids differ ? Give alternative terms for them alos. |
| Answer» Chromatids resulting from interchange of segmenrts are cross over or recombinant chromatids, those that remain intact are noncross over or parental chromatids. | |
| 240. |
How do the back cross and test crss differ? |
| Answer» A back cross is between a hybride organism and any one of the parents, a test corss is between a hybride organism and a recessive parent. | |
| 241. |
What is test cross ? How does it differ from a reciprocal cross ? |
| Answer» A test cross is a cross between an organism of an unknown genotype and a homozygous recessive organism. A reciprocal corss involves the same traits but carried by sexes opposite to those in the original cross. | |
| 242. |
The barr body is observed inA. Basophils of malesB. Neutrophils of femalesC. EosinophilsD. Neutrophils of males |
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Answer» Correct Answer - B The barr body is present in the neutrophil (polymorphonuclear leuocoytes ) of 3 to 50% cells in fem |
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| 243. |
In Drosophila, the sex is determined byA. Whether the egg is fertilized or develops parthenogeneticallyB. The ratio of number of X-chromosomes to the sets of autosomersC. X and Y chromosomes to the sets of autosomesD. The ratio of pairs of X-chromosomes to the pairs of autosomes |
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Answer» Correct Answer - B The ratio of X and A chromosomes responsible for determination of sex in drosophil e.g. Superfemale - Number of X chromosomes XXX/Set of autosome AA. Sex index ratio `(X//A)= (3)/(2)= 1.5` Super femla . |
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| 244. |
In Drosophila, the sex is determined byA. the ratio of pairs of X-chromosomes to the pairs of autosomesB. whether the egg is fertilised or develops parthenogeneticallyC. the ratio of number of X-chromosomes to the set of autosomesD. X and Y-chromosomes |
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Answer» Correct Answer - A Calvin Bridges demonstrated that in Drosophilia, the sex is detemined by ratio of the number of X-chromosomes to the sets of autosomes. According to genic balances theory of sex-determination, Y-chromosome of Drosophilia does not important for the determination of sex. |
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| 245. |
When a cluster of genes shows linkage behaviour theyA. do not show independent assortmentB. induce cell divisionC. do not show a chromosome mapD. show recombination meiosis |
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Answer» Correct Answer - A Linked genes do not show independent assortment because they are located on the same chromosome. But genes which are located on the same chromosomes (called linked genes) do not assort independently. Such type of genes are called linked genes and this phenomenon is called as linkage. |
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| 246. |
When a cluster of genes shows linkage behaviour theyA. Induce cell divisionB. Do not show a chromosome mapC. Show recombination during meiosisD. Do not show independent assortment |
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Answer» Correct Answer - D (d) When a cluter of gene show llinkage behaviour they do not show indepenent assortment because they are located very close to each other . |
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| 247. |
The distance between the genes a,b,c and d in mapping units are a-d=3,5, b-c=1,a-b=6,c-d=1.5, a-c=5. Find out the sequence of arrangeent of these genesA. acdbB. abcdC. acbdD. adcb |
| Answer» Correct Answer - D | |
| 248. |
Find the incorrect statement w.r.t chromosomal mappingA. Crossing over is important in locating genes on chromosomeB. Recombination frequency depends upon the distance between the genesC. Recombination frequency is inversely proportional to distance between genesD. The sequences and relative distances between various genes is graphically represented in term of recombination frequencies |
| Answer» Correct Answer - C | |
| 249. |
What is the recombination percentage between gene y and w in Drosophila ?A. `1.3%`B. `98.7%`C. `62.8%`D. `37.2%` |
| Answer» Correct Answer - A | |
| 250. |
Can you tell which of these column A or B represent the chromosome and which represent the gene ? |
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Answer» Column (A) = Chromosome Column (B) = Gene |
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