1) Who formulated chromosomal theory of inheritance: a. Sutton b. Morgan c. Bateson d. Johannsen
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2) A cross between F1 hybrids with either of the parent is called: a. Back-cross b. Test-cross c. Reverse-cross d. None of these
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3) Which of these terms indicate a pair of contrasting characters or factors: a. Allele b. Phenotype c. Homozygous d. Heterozygous
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4) In case red flower colour is dominant to white flower colour which of these statements is correct: a. All red-flowered plants from red flowered plants b. A few red-flowered plants from red-flowered plants c. Ration of red-flowered plants from white-flowered hybrid plants is 1:1 d. Only white-flowered plants from white-flowered plants
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5) Why pea plants were most suitable for Mendel's experiments than dogs because: a. There were no pidegree records of dogs b. Pea plants can be selfed c. All pea plants have two number of chromosomes d. Dogs have many genetic traits
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6) If opposite alleles come together, one of these only expresses while masking the other. It can be described as: a. Law of independent assortment b. Law of dominance c. Law of segregation d. Law of inheritance
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7) What will be the ration of plants in F2 generation when parents with tall stem (TT) are crossed with dwarf parents (tt): a. 2 tall : 2 dwarf b. 3 tall : 1 dwarf c. 1 tall : 3 dwarf d. None of these
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8) Which will be the correct genotypes of F2 plants obtained by cross between tall (TT) and dwarf (tt) parents: a. TT : tt : Tt : tt b. TT : Tt : tt c. 2 TT : 2 tt d. None of these
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9) Phenotypic ration of F2 hybrids in cross between tall (TT) and dwarf (tt) plants is 3 Tall : 1 dwarf but genotypic ration will be: a. 1 TT : 2Tt : 1tt b. 2 TT : 2 tt c. 1 TT : 1 Tt : 2 tt d. None of these
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10) In a monohybrid cross between red plants (RR) and white plant the F1 hybrids (Rr) are all pink. It is indication of the fact that gene R is: a. Mutant b. Recessive c. Incompletely dominant d. Hybrid
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11) Visible characters in an organism are called: a. Genotype b. Phenotype c. Homozygous d. Heterozygous
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12) Genotype of an organism is its: a. Physical expression b. Genetic consititution c. Homozygous nature d. Heterrozygous nature
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13) In monohybrid cross between tall (TT) and dwarf (tt) parents F2 plants produced in the ration of 3 tall : 1 dwarf are: a. Only in phenotype b. Only in genotype c. Both (a) & (b) d. None of these
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14) Two homologous genes are exactly similar in a genotype, which is: a. Homozygous b. Heterozygous c. Hemizygous d. None of these
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15) Which of these is a heterozygous condition: a. RR b. Rr c. rr d. RRrr
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16) A true breeding tall pea plant when crossed with a true breeding dwarf plant yielded tall plants in F1 generation which on selfing gives rise to 787 tall and 277 dwarf plant in F2 generation. The plants of F1 generation are: a. Homozygous b. Heterozygous c. Hemizygous d. None of these
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17) In a dihybrid cross between round yellow and wrinkled green plants the F2 generation will have 16 individuals in the ration of: a. 9:3:3:1 b. 9:03:04 c. 9:3:1:3 d. 9:07
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18) In a cross between blue and white Andalusian fowls the results due to incomplete dominance will be: a. 50% blue and 50% white fowls b. 50% blue and 50% black fowls c. 25% blue and 75% white fowls d. 25% black and 75% white fowls
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19) Microbial genetics is: a. Genetics of plants b. Genetics of animals c. Genetics of man d. Genetics of bacteria and viruses
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20) A complete set of chromosomes, which is inherited as a unit from one parent is called: a. Genotype b. Genome c. Gamete d. Gene
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21) A heterozygous individual which carries unexpressed recessive gene for a sex-linked character is known as: a. Carrier b. Mutant c. Variant d. None of these
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22) Hybridization in pre-mendelian era: a. Did not take place b. Was unsuccessful when attempted by workers c. Did not result any effective change in nature d. Occurred in nature but the phenomenon was not known
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23) In which of the respect Mendel was lucky in selecting pea plants for his experiments in explaining laws of inheritance: a. Pea plants belong to family leguminosae b. Pea plants show red coloured flowers c. Pea plants have large number of seeds d. All the seven characters he selected were located upon different pairs of chromosomes
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24) If F1 generation of a cross between tall and dwarf plants is of tall plants, it indicates the character to be: a. Dominant b. Recessive c. Mutant d. Sex linked
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25) The fact that F1 plants when backcrossed with double recessive parent gave four types of plants in equal proportions proves that the F1 plants produced: a. Four type of gametes in equal number b. Four types of gametes in ratio of 9:3:3:1 c. Two types of gametes in 3:1 ratio d. Three types of gametes in 3:1:1 ratio
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26) Mule is hybrid offspring of: a. Male and female donkey b. Female horse and male donkey c. Male and female horse d. None of these
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27) Mule is an example of: a. Heterosis b. Hybrid vigour c. Both (a) & (b) d. None of these
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28) The ratio of progeny of dwarf plants in a cross between heterozygous tall plant with homozygous dwarf plant will be: a. 35% b. 50% c. 75% d. 100%
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29) Genetic complement is called: a. Genotype b. Phenotype c. Alleles d. None of these
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30) Who gave laws of segregation and dominance? a. Mendel b. Morgan c. Malpighi d. Muller
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31) Law of dominance states that: a. Out of the two unit factors of contrasting expression of a trait present in an individual only one is expressed b. Characters of parents are assorted independently during the gamete formation c. Contrasting characters of parents are segregated at the time of gametogenesis d. None of these things
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32) The contrasting characters of individuals are represented by unit factors which separate at the time of gamete formation is explained by Meddel's law of: a. Dominance and Recessiveness b. Segregation c. Independent Assortment d. None of these
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33) In cross between more than one pair of contrasting characters the assortment of unit factors is independent of parental combinations is the theme of: a. Law of dominance and recessiiveness b. Law of segregation c. Law of independent assortment d. None of these
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34) In Drosophila, red eye character is dominant over white-eye character. When a homozygous red eye individual is crossed with a homozygous white eye individual and individuals of F1 generation are intercrossed, 12 individuals are produced. White-eye individuals of these will be: a. Three b. Six c. Nine d. Twelve
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35) On the basis of which of these rations, we can prove law of independent assortment: a. 9:3:3:1 b. 9:03:04 c. 1:02:01 d. 2:01:01
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36) Which of these is a recessive trait in Drosophila (fruit fly): a. Red eye colour b. White eye colour c. Both (a) & (b) d. None of these
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37) Skin colour inheritance in mammals is usually: a. Monogenic b. Multiple allelism c. Polygenic d. Pseudoallelism
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38) A ratio of 3:1 in F2 individuals is suggestive of: a. Monohybrid cross b. Dihybrid cross c. Trihybrid cross d. None of these
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39) Ratio of 27:9:9:9:3:3:1 in F2 individuals is suggestive of: a. Monohybrid cross b. Dihybrid cross c. Trihybrid cross d. None of these
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40) Which of these do not follow mendelian ratios: a. Complementary and supplementary genes b. Lethal genes and incomplete dominance c. Modifier genes d. All of these
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41) Segregation of alleles occurs at the time of: a. Cleavage b. Meiosis c. Fertilization d. Crossing over
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42) Before proposing his theory, Mendel: a. Had no idea of factors and genes b. Had idea that all the factors are carried by genes c. Had idea of chromoscmes but not the genes d. Had no idea of chromosomes and genes
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43) In man certain characters may be dominant and recessive. Which of these characters are dominant: a. Colour blindness and haemophilia b. Normal coloured vision and normal clotting c. Testelessness to PTC d. Attached ear lobes
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44) Out breeding in sheep produces improved strains of sheep which provide increased amount of meat and wool than in breeds. This is an example of: a. Heterosis b. Cross breeding c. Inbreeding d. All of these
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45) When two pea plants with white flowers were crossed, F1 hybrids produced purple colour unlike their parents but like their remote ancestors, this is an example of: a. Supplementary genes b. Complementary genes c. Lethal genes d. Atavism
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46) Genes that reduce the viability of individual or cause its death of bearer are called: a. Supplementary genes b. Compementary genes c. Lethal genes d. None of these
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47) When red and white cattles are crossed, they produce a roan offspring which has both red and white hairs on skin, it is called: a. Incomplete dominance b. Codominance c. Atavism d. None of these
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48) Ratio of 9:3:4 is obtained instead of 9:3:3:1 under the condition when there is gene interaction involving: a. Supplementary genes b. Complementary genes c. Both (a) & (b) d. None of these
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49) Instead of usual mendelian ratio of 9:3:3:1 often ratio of 9:7 is obtained in some of the crosses which is possibly due to interaction of: a. Complementary genes b. Supplementary genes c. Modifier genes d. None of these
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50) In a gene interaction the gene that masks the expression of another gene is termed: a. Epistatic gene b. Hypostatic gene c. Both (a) & (b) d. None of these
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51) Allelic gene interaction is exhibited by which of these: a. Incomplete dominance b. Codominance c. Lethal genes d. All of these
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52) Examples of non-allelic gene interaction are: a. Complementary genes b. Supplementary genes c. Modifier genes d. All of these
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53) Mating of closely related individuals is called: a. Inbreeding b. Out breeding c. Atavism d. None of these
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54) Which of these workers coined terms 'homozygous' and 'heterozygous' that we use very commonly in genetics: a. Bateson b. Saunders c. Both (a) & (b) d. None of these
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55) Punnet devised a geometrical method for determining genetic combinations during crosses and know the possible expressions which is called: a. Back-cross method b. Test-cross method c. Checker-board method d. None of these
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56) Besides devising checker-board method Bateson is also known for: a. Coining the term allelomorph for genes of contrasting expressions of characters b. Coining terms 'genotype' and 'phenotype' c. Describing gene interactions d. None of these
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57) Protozoa were first discovered by: a. Pasteur b. Leeuwenhoek c. Darwin d. Kudo
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58) First studied protozoa by Leeuwenhoek was: a. Amoeba b. Euglena c. Vorticella d. None of these
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59) Name protozoa was given by: a. Goldfuss b. Hall c. Jablot d. None of these
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60) Who gave acellular concept for protozoans? a. Dobell b. Von Seibold c. Cuvier d. None of these
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