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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 13201. |
The period of preparation with reference to developmental phenomena in vertebrates means [Pune CET 1998] |
| A. | Formation of gastrula |
| B. | Formation of germ layers |
| C. | Tissue differentiation |
| D. | Parents preparation and elaboration of gametes |
| Answer» E. | |
| 13202. |
At the end of first meiotic division, the male germ cells differentiate into [MP PMT 1994] |
| A. | Spermatogonium |
| B. | Primary spermatocyte |
| C. | Secondary spermatocyte |
| D. | Spermatid |
| Answer» D. Spermatid | |
| 13203. |
Pituitary gland is derived from [MHCET 2004] |
| A. | Ectoderm |
| B. | Endoderm |
| C. | Mesoderm |
| D. | None of these |
| Answer» B. Endoderm | |
| 13204. |
In the development of the human body, the ectoderm is responsible for the formation of [Pb. PMT 1999] |
| A. | Sweat glands |
| B. | Nervous system |
| C. | Lens of the eye |
| D. | All of these |
| Answer» E. | |
| 13205. |
Skeletal muscle develops from [Manipal 1995; CPMT 2004] |
| A. | Ectoderm |
| B. | Mesoderm |
| C. | Endoderm |
| D. | All of the above |
| Answer» C. Endoderm | |
| 13206. |
From which embryonic structure develops the vertebral column [CPMT 1972, 78] |
| A. | Neural canal |
| B. | Archenteron |
| C. | Notochord |
| D. | Blastocoel |
| Answer» D. Blastocoel | |
| 13207. |
The human embryo is about one inch in length after [CPMT 1987] |
| A. | 2 weeks |
| B. | 4 weeks |
| C. | 6 weeks |
| D. | 8 weeks |
| Answer» B. 4 weeks | |
| 13208. |
The capsule enclosing testis of mammal is called as [CPMT 1990; MP PMT 1993] |
| A. | Tunica albuginea |
| B. | Tunica membrana |
| C. | Tunica vaginalis |
| D. | Tunica vesculosa |
| Answer» B. Tunica membrana | |
| 13209. |
There is a connective tissue cord extending between the testis and abdominal wall called [CPMT 1990] |
| A. | Testis cord |
| B. | Gubernaculum |
| C. | Mesentric cord |
| D. | Spermatic cord |
| Answer» E. | |
| 13210. |
Which of the following is 'immortal' [BHU 2005] |
| A. | Somatic cell |
| B. | Glomerular cells |
| C. | Germ cells |
| D. | Cells of pituitary |
| Answer» D. Cells of pituitary | |
| 13211. |
Cells of leydig are found in [CPMT 1998] |
| A. | Kidney of rabbit |
| B. | Kidney of frog |
| C. | Testis of frog |
| D. | Testis of rabbit |
| Answer» E. | |
| 13212. |
Ban- body is found in the nucleus during: |
| A. | interphase in cell of female mammal. |
| B. | interphase in cell of male mammal. |
| C. | prophase in cell of female mammal. |
| D. | prophase in cell of male mammal. |
| Answer» B. interphase in cell of male mammal. | |
| 13213. |
If a trait passes from father to all his daughters but none of his sons, the trait is: |
| A. | Autosomal dominant |
| B. | Autosomal recessive |
| C. | Sex linked dominant |
| D. | Sex linked recessive |
| Answer» D. Sex linked recessive | |
| 13214. |
In sickle-cell anaemia, shape of RBCs under oxygen tension becomes: |
| A. | Biconcave disc like |
| B. | Elongated and curved |
| C. | Circular |
| D. | Spherical |
| Answer» C. Circular | |
| 13215. |
Blackening of urine when exposed to air is a metabolic disorder in human beings. This is due To: |
| A. | Phenylalamne |
| B. | Valine replacing glutamine |
| C. | Glutamine replacing valine |
| D. | Homogentisic acid |
| Answer» E. | |
| 13216. |
A mutation is a: |
| A. | sudden temporary change in an organism's genetic material. |
| B. | change in phenotype followed by a change in genotype. |
| C. | change in hereditary material directed by a changing environment. |
| D. | change in genotype which may result in a new expression of a characteristic. |
| Answer» E. | |
| 13217. |
Match column-I (Definition) with column-II (Terms) and select the correct option from the codes given below. Column-I Column-II A. A single trait bontrolled by three or more than three alleles I. Pleiotropy B. A single trait controlled by three or more than three genes II. Multiple alleles C. A single gene exhibits multiple phenotypic expression III. Polygenic inheritance |
| A. | A-II; B-III; C-I |
| B. | A-III; B-II; C-I |
| C. | A-I; B-II; C-III |
| D. | A-II; B-I; C-III |
| Answer» B. A-III; B-II; C-I | |
| 13218. |
Which of the following statements are correct? (i) Failure of segregation of chromatids during cell division results in aneuploidy. (ii) Chromosomal disorders are mainly determined by alteration or mutation in a single gene. (iii) Thalassemia and cystic fibrosis are Mendelian disorders. (iv) Sickle cell anaemia is an X-linked trait. (v) Haemophilia is an autosome linked recessive disease. |
| A. | (i) and (iii) |
| B. | (i), (iii) and (iv) |
| C. | (iii) and (iv) |
| D. | (ii) and (iii) |
| Answer» B. (i), (iii) and (iv) | |
| 13219. |
Which of the following statements are incorrect? (i) A dominant allele determines the phenotype when paired with a recessive allele. (ii) A recesive allele is weaker than a dominant allele. (iii) A recessive allele do not shows its effects when paired with a dominant allele. (iv) A dominant allele is always better for an organism. |
| A. | (ii), (i) and (iv) |
| B. | (ii) and (iv) |
| C. | (i), (ii) and (iii) |
| D. | (i), (iii) and (iv) |
| Answer» C. (i), (ii) and (iii) | |
| 13220. |
Match the column-I with column-II and choose the correct option._ Column-I Column-II A. Incomplete dominance I. Drosophila B. Mendelian disorder II. Antirrhinum sp. C. Transforming principle III. Griffith D. Dihybrid cross IV. Haemophilia |
| A. | A-I; B-IV; C-III; D-II |
| B. | A-IV; B-II; C-III; D-I |
| C. | A-II; B-III; C-IV; D-I |
| D. | A-II; B-IV; C-III; D-I |
| Answer» E. | |
| 13221. |
One chromosome of a homologous pair carries the genes J and K. The other chromosome of the pair carries the genes j and k at corresponding loci. Crossing over results in exchange of chromosome segments and production of gametes with new combinations of genes. A recombinant type gamete resulting from this crossover might contain: |
| A. | Genes J and K |
| B. | Genes j and K |
| C. | Genes J and j |
| D. | Genes j and k |
| Answer» C. Genes J and j | |
| 13222. |
A diseased man marries a normal woman. They have three daughters and five sons. All the daughters were diseased and sons were normal. The gene of this disease is: |
| A. | Sex-linked dominant |
| B. | Sex-linked recessive |
| C. | Sex-linked character |
| D. | Autosomal dominant |
| Answer» B. Sex-linked recessive | |
| 13223. |
In Shepherd's Purse, the fruit shape is controlled by: |
| A. | Supplementary genes |
| B. | Complementary genes |
| C. | Duplicate genes |
| D. | Polymeric genes |
| Answer» D. Polymeric genes | |
| 13224. |
The \[{{F}_{2}}\] generation of a cross produced identical phenotypic and genotypic ratio. It is not an expected Mendelian result, and can be attributed to: |
| A. | Independent assortment |
| B. | Linkage |
| C. | Incomplete dominance |
| D. | None of the above |
| Answer» D. None of the above | |
| 13225. |
In the \[{{F}_{2}}\]generation of a dihybrid cross between yellow, round seeded and green, wrinkled seeded pea plants, 17 out of 254 pea seeds were green and wrinkled. Other seeds were: Yellow and round; green and round; yellow and wrinkled. These results indicate which of the following statement? |
| A. | Crossing over has occurred. |
| B. | Green and wrinkled are both recessive characters. |
| C. | The alleles for green and wrinkled are linked. |
| D. | The allele for green is recessive but not the allele for wrinkled. |
| Answer» C. The alleles for green and wrinkled are linked. | |
| 13226. |
Mendel's rules do not correctly predict patterns of inheritance for tightly linked genes or the inheritance of alleles that show incomplete dominance or epistasis. Does this mean that his hypothesis are incorrect? |
| A. | Yes, because they are relevant to only a small number of organisms and traits. |
| B. | Yes, because not all data support his hypothesis. |
| C. | No, because he was not aware of meiosis or the chromosome theory of inheritance. |
| D. | No, it just means that his hypothesis are limited to certain conditions. |
| Answer» E. | |
| 13227. |
The person affected by Turner's syndrome has: |
| A. | 45 autosomes and X sex chromosome |
| B. | 44 autosomes and XYY sex chromosomes |
| C. | 45 autosomes and XYY sex chromosomes |
| D. | 44 autosomes and X sex chromosome |
| Answer» E. | |
| 13228. |
Sickle cell anaemia is: |
| A. | caused by substitution of valine by glutamic acid in the beta globin chain of haemoglobin. |
| B. | caused by a change in a single base pair of DNA. |
| C. | characterised by elongated sickle like RBCs with a nucleus. |
| D. | an autosomal linked dominant trait. |
| Answer» C. characterised by elongated sickle like RBCs with a nucleus. | |
| 13229. |
Match the symbols used in human pedigree analysis given in column-I with their name given in column-II and choose the correct option. Column-I Column-II A. I. Consanguineous mating B. II. Normal female C. III. Mating D. IV. Affected female E. V. Parents with male child affected with disease VI. Sex unspecified |
| A. | A-III; B-I; C-II; D-V; E-IV |
| B. | A-II; B-I; C-VI; D-III; E-IV |
| C. | A-III; B-IV; C-I; D-V; E-II |
| D. | A-III; B-I; C-VI; D-V; E-IV |
| Answer» E. | |
| 13230. |
In Mendelian dihybrid cross, when heterozygous round yellow are self crossed, round green offsprings are produced which are represented by genotype? |
| A. | RrYy, RrYY, RRYy |
| B. | RrYY, RRyy, rryy |
| C. | rrYy, rrYY |
| D. | RRyy, Rryy |
| Answer» E. | |
| 13231. |
In genetics, the term test cross means: |
| A. | The crossing of \[{{F}_{1}}\] individual with homozygous recessive. |
| B. | Crossing an \[{{F}_{1}}\] individual with either of the two parents. |
| C. | Crossing \[{{F}_{1}}\] individual with another \[{{F}_{1}}\] individual. |
| D. | Crossing \[{{F}_{1}}\] individual with that of \[{{F}_{2}}\]. |
| Answer» B. Crossing an \[{{F}_{1}}\] individual with either of the two parents. | |
| 13232. |
Repeated selfing produces: |
| A. | Heterozygosity |
| B. | Homozygosity |
| C. | Homozygosity in some and heterozygosity in other traits |
| D. | Pure hybrids |
| Answer» C. Homozygosity in some and heterozygosity in other traits | |
| 13233. |
Rh factor is responsible for which of the following disease? |
| A. | AIDS |
| B. | Turner's syndrome |
| C. | Erythroblastosis foetalis |
| D. | Sickle -cell anaemia |
| Answer» D. Sickle -cell anaemia | |
| 13234. |
Human skin colour is controlled by several gene pairs. Let us assume here that there are just three gene pairs on different chromosomes and that for each pair there are two alleles, an incompletely dominant one that codes for melanin deposition and an incompletely recessive one that codes for no 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? |
| A. | 23377 |
| B. | 44287 |
| C. | 44413 |
| D. | 23621 |
| Answer» B. 44287 | |
| 13235. |
There are three genes a, b, c. Percentage of crossing over between a and b is 20%, b and c is 28% an a and c is 8%. What is the sequence of genes on chromosome? |
| A. | b, a, c |
| B. | a, b, c |
| C. | a, c, b |
| D. | None of these |
| Answer» B. a, b, c | |
| 13236. |
Which of the following match is correct? |
| A. | Sickel cell anaemia - X-chromosome |
| B. | Down Syndrome - 21 chromosome |
| C. | Parkinsonism - XY chromosome |
| D. | Haemophilia - Y chromosome |
| Answer» C. Parkinsonism - XY chromosome | |
| 13237. |
The males of grasshoppers and bugs possess two sets of autosomes and: |
| A. | Only Y-chromosome |
| B. | Only X-chromosome |
| C. | X and Y-chromosome |
| D. | Neither X nor Y-chromosome |
| Answer» C. X and Y-chromosome | |
| 13238. |
Barr-body (seen in saliva test in Olympic games) is associated with: |
| A. | Y-chromosome |
| B. | X-chromosome |
| C. | Autosome |
| D. | Male sex only |
| Answer» C. Autosome | |
| 13239. |
Suppose that in sheep, a dominant allele [B] produces black hair and a recessive allele [b] produces white hair. If you saw a black sheep, you would be able to identify: |
| A. | Its phenotype for hair colour. |
| B. | Its genotype for hair colour. |
| C. | The genotypes for only one of its parents. |
| D. | The genotypes for both of its parents. |
| Answer» B. Its genotype for hair colour. | |
| 13240. |
In a certain plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant rrtt genotype, what will be the percentage of tall plants with red fruits in the progeny? |
| A. | 0.5 |
| B. | 1 |
| C. | 0.75 |
| D. | 0.25 |
| Answer» B. 1 | |
| 13241. |
Which one of the following traits of garden pea studied by Mendel, was a recessive feature? |
| A. | Round seed shape |
| B. | Axial flower position |
| C. | Green seed colour |
| D. | Green pod colour |
| Answer» D. Green pod colour | |
| 13242. |
Which mendelian principle will not operate if two genes under study are close together? |
| A. | Paired unit factors |
| B. | Dominace |
| C. | Segregation |
| D. | Independent assortment |
| Answer» E. | |
| 13243. |
Which of the following parental phenotypes would produce offspring with blood group phenotypes in the expected ratio of 1 type A: 1 type B? |
| A. | Blood group of motherBlood group of fatherAB |
| B. | ABAB |
| C. | ABB |
| D. | ABO |
| Answer» E. | |
| 13244. |
In multiple allele system, a gamete possesses: |
| A. | Two alleles |
| B. | Three alleles |
| C. | One allele |
| D. | Several alleles |
| Answer» D. Several alleles | |
| 13245. |
Number of females is more than males in |
| A. | Gujrat |
| B. | Orissa |
| C. | Tamilnadu |
| D. | Kerala |
| Answer» E. | |
| 13246. |
In which one of the following the birth rate is high & death rate is normal [MP PMT 2001] |
| A. | India and Morocco |
| B. | America and Spain |
| C. | Sweden |
| D. | Indonesia |
| Answer» B. America and Spain | |
| 13247. |
According to population every ...... person of the world is an Indian |
| A. | Fifth |
| B. | Sixth |
| C. | Seventh |
| D. | Eighth |
| Answer» C. Seventh | |
| 13248. |
The percentage of population of India living in M.P. at present is |
| A. | 0.076 |
| B. | 0.0784 |
| C. | 0.0767 |
| D. | 0.0777 |
| Answer» C. 0.0767 | |
| 13249. |
Which of the following state has the highest population density [MP PMT 1989, 90] |
| A. | West Bengal |
| B. | Madhya Pradesh |
| C. | Nagaland |
| D. | Maharashtra |
| Answer» B. Madhya Pradesh | |
| 13250. |
The total national income is divided by the total population of the country, then it is known as |
| A. | Per capita income |
| B. | Population income |
| C. | Per capita production |
| D. | Per capita gross income |
| Answer» B. Population income | |