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.
| 101. |
Identify the incorrect statementA. Alleles b and c also produce sugarB. Alleles `I^(A)` and `I^(B)` produce sugarsC. when `I^(B)` and b or I are present only `I^(B)` is expressedD. Both `I^(A)` and `I^(B)` are present together and they express because of codominance. |
| Answer» Correct Answer - A | |
| 102. |
The alternative form of gene is calledA. DominantB. Recessive charactersC. Alternative genesD. allele |
| Answer» Correct Answer - D | |
| 103. |
In an experiment on pea plant, pure plants with yellow round seeds (YYRR) were crossed with plants producing green wrinkled seeds (yyrr). What will be phenotypic ratio of `F_(1)` progeny ?A. All round yellowB. 1 round yellow, 1 round green, 3 wrinkled greenC. 1 round yellow, 1 round green, 1 wrinkled yellow, 1 wrinkled greenD. |
| Answer» Correct Answer - A | |
| 104. |
Who coined the term geneA. JohannsenB. BatesonC. Morganian geneticsD. Correns |
| Answer» Correct Answer - A | |
| 105. |
When looking at the inheritance of a single characteristic, Mendel found that a cross between two true breeding peas (betwwen purple and white, for example) always yielded a …… in the `F_(2)` -generation.A. 1 : 1 phenotypic ratioB. 3 : 1 genotypeic ratioC. 1 : 2 : 1 phenotypic ratioD. 3 : 1 phenotypic ratio |
| Answer» Correct Answer - D | |
| 106. |
Two true breeding varieties of garden peas are crossed. One parent had red, Axial flowers, and the other had white, terminal flowers. All `F_(1)` individuals had red, exial flowers. If 100 `F_(2)` offsprings wee counted, how many of them would you expect to have red axial flowers?A. 6B. 25C. 19D. 56 |
| Answer» Correct Answer - D | |
| 107. |
A true breeding fruit fly would be ……. For a certain characteristic.A. Homozygous dominantB. Homozygous recessiveC. Both (a) and (b)D. heterozygous |
| Answer» Correct Answer - C | |
| 108. |
What phenotypes are possible from the cross, between round seeded plant and wrinkled seeded plants if both thte parents are homzygous?A. All roundB. Round and wrinkledC. All wrinkledD. Slightly wrinkled |
| Answer» Correct Answer - A | |
| 109. |
Mendel crossed plants with red and white flowers. In the `F_(1)` only red flowereed plants wee found. Two `F_(1)` plants were crossed and in `F_(2)` -generation 2950 red and 1050 white flowered plants were obtained. It is reasonable, he concluded thatA. Mutation had occurredB. The genes for white flower is incompletely dominantC. The probability of white flowereed plant is 1/4D. No reason can be attributed |
| Answer» Correct Answer - C | |
| 110. |
Mendel proposed that in a true breeding, tall or dwarf pea variety of the allelic pair of genes for height areA. HomozygousB. heterozyagousC. hybridD. Both (b) and (c) |
| Answer» Correct Answer - A | |
| 111. |
Which statement describes the work of Gregor Mendel?A. He developed some basic principles of heredity without having knowledge of chromosomesB. He developed the microscope for the study of genes in pea plantsC. He explained ht principle of dominance on the basis of the gene- chromosome theoryD. He used his knowledge of gene mutations to explain the appearance of new traits in organisms |
| Answer» Correct Answer - A | |
| 112. |
A true breeding line is one thatA. Having undergone continuous sell pollinationB. Shows the stable trait inheritanceC. Shows expression for several generationD. all of the above |
| Answer» Correct Answer - D | |
| 113. |
In his experiments, Mendel obtained wrinkled pea. The wrinkling was due to deposition of sugar instead of starch. This happended due to theA. amylase enzmeB. Invertase enxymeC. Diastase enzymeD. Absence of starch-branching enzyme |
| Answer» Correct Answer - D | |
| 114. |
In a dihybrid crossm if you get `9:3:3:1` ratio it denotes thatA. The alleles of two genes are intracting with each otherB. It is a multigenic inheritanceC. It is a case of multiple allelismD. The alleles of two genes are scgregation independently |
| Answer» Correct Answer - D | |
| 115. |
A hybrid black coated Guinea pig produces two million sperm cells. Approximately, what number its sperm cells contain the recessive gene for white colour?A. 1.0 millionB. 2.0 millionC. 2.25 millionD. 3.5 million |
| Answer» Correct Answer - A | |
| 116. |
How many true breeding pea lines were selected by Mendel in his experiments?A. 7B. 4C. 14D. 10 |
| Answer» Correct Answer - C | |
| 117. |
Using the results of his experiments with pea plant crosses, Gregor Mendel discovered theA. Principles of dominance, segregation and independent assortmentB. Intermediate inheritance and gene linkageC. Pea plants develop mutations after exposure to radiationD. DNA is involved in the inhertiance of dominant traits |
| Answer» Correct Answer - A | |
| 118. |
In addition to pea, Mendel had carried out hybridisation experiments in another plant also, where he could not establish the findiangs he had previously obtained on pea plants. This plants waA. BeanB. MaizeC. AntirrhinumD. Hieracium |
| Answer» Correct Answer - D | |
| 119. |
Mendel conducted his experiments using several pea lines, which ewereA. True-breedingB. Non-breedingC. self-breedingD. None of these |
| Answer» Correct Answer - A | |
| 120. |
The advantages Mendel got by selecting Pisum sativum for his experiments were I. well defined characters of the plant. II. Self-fertilisation iii. Unisexual flower.iv. More time cosumption in growing season. Choose the correct option.A. I and IIB. II and IIIC. only IVD. I, II and III |
| Answer» Correct Answer - A | |
| 121. |
How many different kinds of female gametes are produced by the `F_(1)` offsprings from a cross between a pure strain of plants with yellow peas and a pure strain of plants with green peas?A. OneB. TwoC. FourD. Eight |
| Answer» Correct Answer - B | |
| 122. |
How many different kinds of gametes can an organism of genotypes A/a, B/B, C/c produce?A. 3B. 4C. 9D. 16 |
| Answer» Correct Answer - B | |
| 123. |
During the experiments, Mendel called genes by the termA. TraitsB. CharactersC. FactorsD. Qulities |
| Answer» Correct Answer - C | |
| 124. |
If genes are not linked, a genotype of PpRr can produce………….. Different kinds of gametes.A. OneB. TwoC. ThreeD. Four |
| Answer» Correct Answer - D | |
| 125. |
When two individuals, heterozygous for the same genes, are bred together, they produceA. Only dominant phenotypes, all of he same genotypesB. Only recessive phenotypesC. Only dominant phenotypes of different genotypesD. Both recissive and diminant phentypes. The Latter being of two genotypes |
| Answer» Correct Answer - D | |
| 126. |
How many geneticaly different kinds of gametes will an individual with genotype Aabb produce?A. oneB. TwoC. ThreeD. Four |
| Answer» Correct Answer - A | |
| 127. |
If one gametophyte fern plant shows characters A and B and is crossed with another plant having a and b then what will be the gametophytic generation (gametes) with respect to these two characters?A. 1 AB: 1 Ab: 1 aB: 1 abB. 1 AB: 2 AB: 1 abC. 3 AB: abD. 9 AB:3 Ab: 3 aB: 1 ab |
| Answer» Correct Answer - A | |
| 128. |
Rrrr progeny : Red (dominant) flowered heteroxygous crossed with white flowerA. 350tored:250towhite`B. `450tored:250towhite`C. `380tored:320towhite`D. None of the above |
| Answer» Correct Answer - A | |
| 129. |
The work of Mendel remained unnoticed for 34 yrs becauseA. partly he published his work in an obcure journalB. Partly his ideas were ahead of his timeC. Both (a) and (b) are correctD. Both (a) and (b) are incorrect |
| Answer» Correct Answer - C | |
| 130. |
An organism with two copies of the same allele isA. Homozygous for that traitB. Homologous for the alleleC. heterozygous for that traitD. heterologous for the allele |
| Answer» Correct Answer - A | |
| 131. |
Which of the following statements are correct? I. Inbreeding is the process of mating of individuals, which are more closely related than the other in a population to which they belong. ii. The loss of vigour is called inbreeding depression. iii. The collaborator genes are aalso called pseudoalleles iv. complementary genes mask the expression of other geneA. I,II,and IIIB. II and IVC. III and IVD. I and II |
| Answer» Correct Answer - D | |
| 132. |
Which of the following statements ae correct? i. Expressivity of a gene is defined as the ability to express itself uniformly in all the individuals with same genotype. II. When one gene masks, inhibits or suppresses the expression of other, the phenomena is called epistasis. iii. Gene penetrance is the ability of gene to express itself in an individual that carries it. iv. Inhibiting genes interact in such a way that one dominant gene produces its effect irrespective of the presence or absence of other.A. I,II,and IIIB. II and IVC. III and IVD. II and III |
| Answer» Correct Answer - A | |
| 133. |
Which one of the following individuals cannot produce 16 different gametes?A. Aa Bb Cc DD Ee FfB. Aa Bb Cc DD Ee FfC. Aa Bb cc DdD. Both (a) and (c) |
| Answer» Correct Answer - C | |
| 134. |
`F_(2)` - generation is produced byA. Crossing `F_(1)` progeney with one of th eparentsB. selfing the progency of two individual parentsC. Selfing the parentsD. recessive cross between individual parents |
| Answer» Correct Answer - B | |
| 135. |
Polymorphism is due toA. Monogenic inheritanceB. polygenic inheritanceC. Both (a) and (b)D. None of these |
| Answer» Correct Answer - C | |
| 136. |
Genetics deal withA. heredity and variationsB. heredityC. MutationsD. Nuclear and cytoplasmic inheritance |
| Answer» Correct Answer - A | |
| 137. |
The minature form fo individuals discussed in preformation theory areA. SpermsB. PangenesC. HomunculusD. Gemmules |
| Answer» Correct Answer - C | |
| 138. |
Which of the following does not come under transimission genetics?A. Molecular geneticsB. Mendelian geneticsC. Morganian geneticsD. non- Mendelian genetics |
| Answer» Correct Answer - A | |
| 139. |
The emportan assumption is made by Mendel and sustaintiated by the discovery of meiosis is/are theA. Law of segregationB. Law of independent assortmentC. Both (a) and (b)D. Constant number of chromosomes in members of the same species, which is maintained by formation gametes and the act of fertilisation |
| Answer» Correct Answer - C | |
| 140. |
The dihybrid ratio 9:3:4 comes in case/s ofA. Recessive epistasis ratioB. supplementary gene ratioC. Both (a) and (b)D. dominant epistasis |
| Answer» Correct Answer - C | |
| 141. |
Genes A and B are necessary for normal hearing. A deaf man marries a deaf woman and all their children have normal hearing. The genotype of the parents areA. AAbb and AAbbB. Aabb and aaBbC. Aabb and aaBbD. aaBB and aaBb |
| Answer» Correct Answer - C | |
| 142. |
In man, brown eyes (B) are dominant over blue (b) and dark hair (D) dominant over red hair (d). A man with brown eyes and red hair marries a woman with blue eyes and dark hair. They got two children, one resembling the man and other the woman, genotypes of the man and woman wereA. BBdd,bbDDB. Bbdd,bbDdC. BBdd,bbDdD. Bbdd,bbDD |
| Answer» Correct Answer - B | |
| 143. |
From a single ear of corn, a farmer planted 200 kernals which produced 140 tall and 40 dwarf plants. The genotype of these offsprings are most likelyA. TT, Tt and ttB. Tt and ttC. TT and TtD. tt and tt |
| Answer» Correct Answer - A | |
| 144. |
Imagine that in a pea plant, the factors for controlling seed coat colour and shape of seeds are present on the same chromosmes are very close together. Performing dihybrid experiments with these characters Mendel would not have been able to arrive at the idea ofA. Independent assortmentB. DominanceC. Incomplete dominanceD. Segregation |
| Answer» Correct Answer - A | |
| 145. |
Pea plants that were heterozygous for both height and colour of seed coat (TtYy) were crossed with pea plants that wwere homozygous recessive for both traits (ttyy). The offsprings from this cross included tall plants with green seeds, tallplants with yellow seeds, short plants with green seeds, and short plants with yellow seeds. This cross best illustratesA. Gene mutationB. Independent assortment of chromosomesC. Environmental influence on herdityD. Intermediate inheritance |
| Answer» Correct Answer - B | |
| 146. |
In dihybrid cross, out of 16 plants obtained, the number of genotypes shall beA. 4B. 9C. 16D. 12 |
| Answer» Correct Answer - B | |
| 147. |
Heterozygous organisms Bb produce B and b gametes, The chance of b combining with B or b areA. 1/1B. 1/2C. 1/4D. None of these |
| Answer» Correct Answer - B | |
| 148. |
Number of different ypes of gametes produced by an individual with genotype Aa Bb Cc Dd wil beA. 16B. 64C. 4D. 128 |
| Answer» Correct Answer - A | |
| 149. |
RrYy yields gamete typesA. OneB. TwoC. ThreeD. Four |
| Answer» Correct Answer - D | |
| 150. |
Double homozygous individuals in `F_(2)` generation of a dihybrid cross would beA. 1/16B. 2/16C. 6/16D. 9/16 |
| Answer» Correct Answer - B | |