Question 1 :
If a double-stranded DNA molecule contains 30% T, how much G does it contain?
Question 2 : <p>The sequence of events in geographic speciation is most likely to be</p>
Question 3 : <p>Rrrr (progeny): Red (dominant) flowers (heterozygous) were crossed with white flower. The result will be</p>
Question 7 : <p>Total number of round seed in a cross between pure yellow round and pure green wrinkled seeds in <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed0b24522391749b43d1629"/>is (out of total 16 resulted)</p>
Question 8 : <p>Two pea plants were subjected for cross pollination. Of the 183 plants produced in the next generation,94 plants were found to be tall and 89 plants were found to be dwarf. The genotypes of the two parental plants are likely to be</p>
Question 9 :
A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by
Question 10 :
Among the following characters, which one was not considered by Mendel in his experiments on pea?
Question 12 :
Haemophilia is more commonly seen in human males than in human females because.
Question 13 :
If two persons with ‘AB’ blood group marry and have sufficiently large number of children, these children could be classified as ‘A’ blood group: ‘AB’ blood group : ‘B’ blood group in 1:2: 1 ratio. Modern technique of protein electrophoresis reveals presence of both ‘A’ and ‘B’ type proteins in ‘AB’ blood group individuals.This in an example of
Question 14 : <p>In cross between yellow round (YYRR) and green wrinkled (yyrr) find out the ratio between seeds having yellow and green seed colour</p>
Question 15 : <p>What percentage of homozygous <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed0b2818ccf4a7e96434997"/>will be born amongst four children of a couple where the husband is heterozygous for <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed0b28122391749b43d1655"/>and wife is homozygous for <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed0b2818ccf4a7e96434997"/>gene?</p>
Question 17 : <p>Comparative anatomy and morphology shows …A… and …B… among organisms of today and those that existed years ago. Such similarities can be interpreted to understand whether …C… ancestors were shared or not</p><p>Choose the correct option for A, B and C the complete the given NCERT statement</p>
Question 18 :
A marsupial evolved from ancestral stock, but all within Australian continent. This represents
Question 19 :
Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as.
Question 23 :
Which of the following was NOT part of Darwin's explanation of natural selection?
Question 24 :
{tex}\mathbf{Assertion}{/tex} : Leaf butterfly and stick insect show mimicry to dodge their enemies.<br>{tex}\mathbf{Reason}{/tex} : Mimicry is a method to acquire body colour blinding with the surroundings.
Question 27 : Two set of traits of garden pea are shown in the diagram. Identify the dominant pair of traits.<br> <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/NEET/5ede1b637ee10079863399a2' class="uploaded-image" />
Question 29 : <p>Phenylalanine does not changed to tyrosine. This condition is seen in</p>
Question 33 : <p>I. Myotonic dystrophy is an autosomal dominant trait</p><p>II. Sickle-cell anaemia is an autosomal recessive trait</p><p>III. Failure of segregation of alleles results in chromosomal loss</p><p>IV. Failure of segregation of allele result in chromosomal gain</p><p>V. Cystic fibrosis is a Mendelian disorder</p><p>Correct statements are</p>
Question 37 :
A point mutation where guanine is replaced by cytosine is also called
Question 38 : The correct match is - <br><table><tr><td>Column A</td><td>Column B</td></tr></td></tr><tr><td>I. mRNA </td><td>A. tRNA</td></tr><tr><td>II. Anticodon </td><td>B. Codon</td></tr><tr><td>III. Semiconservative DNA Replication</td><td>C. Transformation mode </td></tr> </td></tr><tr><td>IV. Griffith </td><td>D. Meselson & Stahl</td></tr></table>
Question 39 :
Mendel studied inheritance of seven pairs of traits in Pea which can have 21 possible combinations. If you are told that in one of these combinations, independent assortment is not observed in later studies, your reaction will be
Question 40 : <p>Which of the following are the correct pair of homologous organs?</p><p>I. Hands of man and wings of bat</p><p>II. Wings of bat and wings of cockroach</p><p>III. Wings of bird and wings of butterfly</p><p>IV. Fins of fish and forelimbs of horse</p><p>V. Forearm of human and forelimbs of horse</p><p>The correct combination is visible in option</p>
Question 42 : <p>Which of the following statements correctly defines the phenomenon of genetic drift?</p><p>I. Random change in gene allele frequency</p><p>II. Occur by chance</p><p>III. It is directional</p><p>IV. Causes elimination of certain alleles</p><p>V. Causes fixation of alleles</p><p>The correct combination is</p>
Question 43 :
Which type of selection is industrial melanism observed in moth, Biston betularia
Question 44 :
One of the possible early sources of energy was / were:
Question 47 : <p>Both husband and wife have normal vision though their fathers were colourblind and mothers did not have any gene for colour blindness. The probability of their daughter becoming colourblind is </p>
Question 48 :
In a cross between AABB{tex} \times {/tex}aabb, the ratio of {tex}\mathrm F _ { 2 } {/tex} genotypes between AABB, AaBB, Aabb and aabb would be
Question 49 :
The backbone of RNA consists of which of the following sugars?
Question 52 :
The evidence for the origin of birds from reptiles is the presence in them of:
Question 55 : <p>The two …A… separate and pass into two daughter nuclei and cells during mitosis. Similarly, each …B… replicates, with one pair passing into each daughter cell during mitosis. This maintains the similar …C… of all the cells.</p><p>Find out correct option for A, B and C</p>
Question 56 :
The diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos islands, as observed by Darwin, provides evidence for
Question 59 : Match the column-I with column-II and choose the correct option. <table><tr><td>Column -I</td><td>Column -II</td></tr> <tr><td>A. Incomplete dominance</td><td>I. Drosophila</td></tr> <tr><td>B. Mendelian disorder</td><td>II. Antirrhinum sp.</td></tr> <tr><td>C. Transforming principle</td><td>III. Griffith</td></tr> <tr><td>D. Dihybrid cross</td><td>IV. Haemophilia</td></tr></table>
Question 60 : <p>In plants like <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed09d22034cc06301290e2a"/>, the leaves are compound but their seedlings possess simple leaves. This phenomenon can be explained by</p>
Question 61 :
In the hexaploid wheat, the haploid (n) ad basic (x) numbers of chromosomes are
Question 63 :
Which one of the following is an incorrect statement regarding mutations?
Question 64 : <p>A condition characterized by not having an exact number of chromosomes in a multiple of haploid set is called</p>
Question 65 : <p>Genic balance theory of sex determination, stated by C B Bridges, is related to</p>
Question 67 :
1 : 1 : 1 : 1 ratio of progenies can be obtain if the plants for crossing are : <br>A. TTRR x ttRR <br>B. TtRr x ttrr <br>C. TtRR x ttrr <br>D. Ttrr x ttRr
Question 68 : <p>A true breeding plant producing red flowers is crossed with a pure plant producing white flowers. Allele for red colour of flower is dominant. After selfing the plants of first filial generation, the proportion of plants producing white flowers in the progeny would be</p>
Question 69 :
A and B genes are linked. What shall be genotype of progeny in a cross between AB / ab and ab/ab?
Question 70 : <p>Half-life of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed09d68034cc06301290ed6"/> is …A… , and the material used in determining the age of fossil is …B… . <br />Here A and B refers to</p>
Question 71 : <p>Prehistoric cave art developed about …A… years ago. Agriculture came around …B… years back and human settlements started. Choose an appropriate option for A and B to complete the given NCERT statement</p>
Question 72 :
Which one of the following is not a part of transcription unit in DNA?
Question 74 : <p>The linkage map of X-chromosomes of fruit fly has 66 units, with yellow body gene (y) at one end and bobbed hair (b) gene at the other end. The recombination frequency between these two genes (y and b) should be </p>
Question 77 :
Choose the correct option:<br />I. Genetic maps are extensively used as starting point inthe sequencing of whole genome as was done in case of the Human genome sequencing project.<br />II. UV-rays can cause mutation in organisms.<br />III. Deletion and insertions of base pairs of DNA causeframe-shift mutations.<br />IV. Mendelian disorders may be dominant or recessive.
Question 78 :
Which of the following symbols represents a potential genotype of a standard (nongamete) body cell?
Question 79 :
Which one of the following conditions though harmful in itself, is also potential saviour from a mosquito borne infectious disease{tex}?{/tex}
Question 81 :
{tex}\mathbf{Assertion}{/tex} : Natural selection is the outcome of difference in survival and reproduction among individuals that show variation in one or more traits.<br>{tex}\mathbf{Reason}{/tex} : Adaptive forms of a given trait tend to become more common; less adaptive ones become less common or disappear.
Question 82 :
Assertion (A) Amber codon is a termination codon. Reason (R) If in an mRNA, a termination codon is present, the protein synthesis stops abruptly whether the protein synthesis is complete or not.
Question 83 :
Assertion : A gene many have several allelomorphs.<br>Reason : Wild form can mutate in more than one ways.
Question 85 :
What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors?
Question 86 : <p>Given below some major events in the early history of life</p><p>I. First heterotrophic prokaryotes</p><p>II. First eukaryotes</p><p>III. First autotrophic prokaryotes</p><p>IV. First animals</p><p>Choose the correct sequence of these evolutionary events</p>
Question 88 : <p>In <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed0b3e28ccf4a7e96434b42"/>gene for white eye mutation is also responsible for depigmentation of body parts. Thus , a gene that controls several phenotypes is called </p>
Question 89 : <p>In which mode of inheritance, do you expect more maternal influence among the offsprings?</p>
Question 90 : <p>An <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed0b2818ccf4a7e96434997"/>individual receives <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed0b28122391749b43d1655"/>blood. The recipient becomes</p>
Question 91 :
A definition of the term "Species" based on reproduction has distinct limitations, which include its being -
Question 92 :
A man having the genotype EEFGgHH can produce P number of genetically different sperms, and a woman of genotype liLLMmNn can generate Q number of genetically different eggs. Determine the values of P and Q.
Question 93 : <p>‘PP’ is a type of selection that favours both small sized and large-sized individual. ‘PP’ eliminates most of the members with mean expression, so as to produce two peak in the distribution of the tract that many lead to the development of two different populations. Identify ‘PP’</p>
Question 94 : <p>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 no melanin deposition and an incompletely recessive one that codes for no melanin deposition. If a very dark skinned person marries a very light skinned women, what will be the chance that their offspring will have very dark skin? </p>
Question 95 : The following crosses refer to experiments using the fruit fly, Drosophila. <br>True-breeding red-eyed flies with plain thoraxes were crossed with pink-eyed flies with striped thoraxes. The F1 flies were then test crossed against the double recessive as follows: <br>red eye × pink eye <br>Plain thorax striped thorax <br>The following F<sub>2</sub> generation resulted from the cross. <table><tr><td>80</td><td>16</td><td>12</td><td>92</td></tr><tr><td>red eye</td><td>red eye </td><td>pink eye </td><td>pink eye</td></tr><tr><td>plain thorax </td><td>striped thorax</td><td>plain thorax </td><td>striped thorax </table>What percentage number of recobinants resulted from the testcross?
Question 97 :
The genetic defect-adenosine deaminase (ADA) deficiency may be cured permanently by
Question 98 :
A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind?
