1. Scientific basis for heredity was first given by
1) Bateson 2) Mendel 3) Morgan 4) Muller
2. Mendels principles were confirmed by
I. Punnet II. Hugo de Vriese III. Correns IV. Tschermak
1) I,II and III 2) II,III and IV 3) I,III and IV 4) I,II and IV
3. Study the following and identify the correct match
Character of the plant Recessive trait
A. Colour of cotyledon I) Wrinkled
B. Colour of seed coat II) Yellow
C. Colour of unripe pods III) Constricted
D. Shape of mature seed IV) Green V) Grey
1) A-III, B-V, C-II, D-I 2) A-IV, B-V, C-II, D-III 3) A-IV, B-V, C-II, D-I 4) A-V, B-IV, C-II, D-I
4. If a cross is made between the parents having a genotype RrYy and RRyy, the total number of plants of the progeny with Round and green seeds would be
1) 12/16 2) 4/16 3) 1/2 4) 9/16
5. If a cross is made between plants with Rr yy Tt and rr YY tt, plants with the following genotype are not formed.
1) Round, Yellow, Tall 2) Wrinkled, Green, Dwarf
3) Wrinkled, Yellow, Dwarf 4) Round, Yellow, Dwarf
6. In Mendel’s dihybrid cross, formation of F2 plants with Green and Wrinkled seeds shows that
1) Recessive traits that fail to appear in F1 can appear in F2
2) Behaviour of a pair of characters is independent of another pair of characters.
3) To alleles of a gene do not blend and are separated during meiosis
4) F2 plants with P genotype can never be formed
7.Identify the Genotypes that show similar phenotypes
I) YyRR II) yyRr III) YYRr IV) YyRr
1) I, II, III 2) I, III, IV 3) II, III, IV 4) I, II, IV
9. Out of 16 plants formed in F2 generation of a dihybrid cross, the total number of individuals that neither show the genotype of P generation nor F1 generation is
1) 12 2) 6 3) 10 4) 14
10. [A] : Dihybrid cross of Mendel explains the law of independent assortment.
[R] : F2 progeny of dihybrid cross has plants with Round Yellow and wrinkled green seeds.
1) Both A and R are true and R is the correct explanation of A
2) Both A and R are true but R is not the correct explanation of A
3) A is true but R is false 4) A is false but R is true
11. In a dihybrid test cross individuals with the following genotype are not formed
1) Rr Yy 2) rr yy 3) Rr yy 4) RR yy
12. Among the Green Round seeded plants of F2 generation of a dihybrid cross the probability of obtaining plants with yy RR genotype is
1) 1 2) 1/3 3) 2/3 4) 1/2
13. The probability of obtaining F2 individuals with the genotype Yy RR is
1) 2) 3) 4)
14. The probability of formation of gametes with alleles RY in F1 generation plants during dihybrid cross experiments is
1) 1/2 2) 3/4 3) 1/4 4) 1/8
15. In Bateson and Punnet experiments, the formation of the following progeny shows that genes for petal colour and pollen shape are present on the same chromosome.
1) Blue, Long 2) Red, Round 3) Blue, Round 4) Red, Long
16. Linked genes are separated by a phenomenon known as
1) Segregation 2) Synapsis 3) Crossing Over 4) Dispersion
17. Bhaskara is a variety of
1) Apple 2) Banana 3) Orange 4) Rice
18. Mutations that occur due to replacement of a pair of nucleotides in a DNA are called as
1) Translocations 2) Deletions 3) Point mutaions 4) Duplications
19. The best way of expressing trisomic conditions is
1) 2n + 1 2) 2n - 1 3) n, n + 1 4) n + 1, n + 1
20. Chromosome maps were first drawn by
1) Punnet 2) de vriese 3) Morgan 4) Bateson
21. Homozygous dominant progeny is not formed in
I) Parental cross II) F2 generation III) Back cross IV) Test cross
1) I and II 2) II and III 3) III and IV 4) I and IV
22. The test cross Phenotypic ratio for Trihybrid cross is
1) 1:1:1:1 2) 1:1:1:1:1:1 3) 1:1:1 4) 1:1:1:1:1:1:1:1
23. In a trihybrid cross the total F2 progeny obtained is 1280. How many of these individuals would be phenotypically having Axillary flowers, wrinkled seeds and green unripe pods.
1) 60 2) 180 3) 20 4) 540
24. Cytogenetics plays a key role in the following branch of botany
1) Plant Physiology 2) Plant Ecology 3) Plant Pathology 4) Plant Breeding
25. Choose the traits of Pea plant that can’t appear in F1 generation of Mendelian Genetics.
I. Constricted fruits II. Grey seed coats III. Green Pods IV. Terminal Flowers
1) I, II and III 2) II, III, IV 3) I, III, IV 4) I, II, IV
26. Identify the character of Pea plant that can be seen in P, F1 and F2 generations.
1) Wrinkled seeds 2) Yellow cotyledons 3) Yellow unripe pods 4) Green cotyledon
27. In Bateson and Punnet experiment, the probability of formation of F2 generation plants with recessive parental genotype was
1) 7/8 2) 3/16 3) 7/16 4) 9/16
28. Statistics was first applied in Genetics by
1) Muller 2) Morgan 3) Mendel 4) Bateson
29. [A] : In Mendel’s Monohybrid cross the probability of obtaining dwarf plants in F1 generation is zero.
[R] : F1 individuals of monohybrid cross don’t have alleles for dwarfness.
1) Both A and R are true and R is the correct explanation of A
2) Both A and R are true but R is not the correct explanation of A
3) A is true but R is false 4) A is false but R is true
30. Identify the set of alleles of Pea that can not be present in a given gametes.
1) T Y r 2) T t r 3) T Y R 4) t y r
31. A Pea plant with Tt Yy genotype can form the gametes with the following combination of alleles.
1) TY, Ty, ty 2) TY, tY, ty 3) Ty, tY, ty 4) TY, ty, Ty, tY
32. Mendel’s principle of independent assortment can be shown by the results of
1) Test cross 2) Back cross 3) Monohybrid cross 4) Dihybrid cross
33. How many contrasting traits of Pea seeds were shown by Mendel
1) One 2) Two 3) Three 4) Seven
34. Mendel’s experiments revealed
1) The principle of linked genes 2) A gene having two alternate forms
3) A gene having only one form
4) Disappearance of parental phenotypes in F1 generation
35. These seeds of Pea were used as parents by Mendel in his dihybrid cross experiments.
1) Round-green, Wrinkled-yellow 2) Round-yellow, Wrinkled-white
3) Round-red, Wrinkled-green 4) Round-yellow, Wrinkled-green
36. The probability of obtaining F2 Pea plants with Rr Yy genotype is
1) 1 2) 5/8 3) 3/8 4) 1/4
37. The total probability of obtaining F2 pea plants of dihybrid cross which show neither parental genotype nor F1 genotype is
1) 5/8 2) 3/8 3) 9/16 4) 7/8
38. [A] : The probability of obtaining new combination of phenotypes of F2 generation Pea plants of dihybrid cross is more than that of obtaining recessive parental phenotypic plants.
[R] : All new combinations of phenotypes of F2 generation plants are heterozygous for both pairs of characters.
1) Both A and R are true and R is the correct explanation of A
2) Both A and R are true but R is not the correct explanation of A
3) A is true but R is false 4) A is false but R is true
39. The probability of obtaining homozygous individuals in F2 generation of Monohybrid and dihybrid crosses is respectively
1) 1/2 and 1/4 2) 1/4 and 1/8 3) 1/2 and 1/8 4) 1/4 and 5/8
40. Linkage was first noticed in
1) Drosophila 2) Maize 3) Mirabilis 4) Lathyrus
