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Genetics and Evolution NEET Questions With Answers pdf
NCERT Solutions For Class 12 Science Biology Genetics and Evolution: In this article, we will provide you detailed NCERT Solutions For class 12 science biology Genetics and Evolution. These heredity and evolution class 10 exercise answers were prepared by the best faculty in India to score good marks in the subject Science.
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41. geometrical device which helps in visualizing all the possible combinations of male and female gametes is called
(a) Bateson square
(b) Mendel square
(d) Payen’s square
(C) Punnett square
Ans:- C
42. If a plant heterozygous for tallness is selfed, the Fy generation has both tall and dwarf plants. It proves the principle of
(b) Segregation
(a) Dominance
(d) Incomplete dominance T2
(c) Independent assortment
Ans:- B
43. Segregation of hereditary factors, occurs in plants during the process of
(b) Gamete formation
(a) Spore formation
(d) Disjunction
(c) Fertilisation
Ans:- B
44. An offspring of two homozygous parents differing from one another by alleles at only one gene locus is known as
(b) Monohybrid
(a) Back cross
(c)Dihybrid
(d) Trihybrid
Ans:- B
45. Somaclonal variations are:
(a) Variations produced in tissue culture
(b) Variations produced during sexual reproduction
(c)Variations caused by mutagens
(d) Variations caused by gamma rays
Ans:- A
46. A clone is a collection of genetically
(a) Identical individual obtained by vegetative reproduction
(b) Identical individual produced by sexual reproduction
(c) Different individual produced by sexual reproduction
(d) Gene pool
Ans:- A
47. Number of characters studied in garden pea by Mendel were
(a) Five
(b) Three etovert
(C) Six
(d) Seven
Ans:- D
48. The process of removing stamens from the flower bud during hybridisation is called
(a) Crossing
(b) Selfing
(c)Emasculation
(d) Copying
Ans:- C
49. Which of the following characters of pea was not studied by Mendel ?
(a) Length of plant
(b) Size of seed
(c) Colour of pod
(d) Shape of pod
Ans:- B
50. Most extensively studied material in genetics is
(a) E. coli
(b) Maize
(C) Pea
(d) Drosophila
Ans:- D
51. Blood groups are controlled by genes and are hence hereditary. Which group is most common in India ?
(a) B and Rh+
(b) A and Rh+
(c) O and Rh-
(d) AB and Rh+
Ans:- A
52. When both alleles express their effect on being present together, the phenomenon is called
(a) Dominance
(b) Codominance
(C) Pseudodominance
(d) Amphi Dominance
Ans:- B
53. Which cross will give a genotypic ratio of 1 :2:21?
(a)Tr × tr
(b) Ir XrT
(C) TR X tR
(d) tr X tr
Ans:- B
54. A cross YYRr X YyRR, the offsprings will show the genotypic ratio
(a) 2 YyRR: 2 YYRR
(b) 1 YYRR: 3 YyRR
(c) 4 YYRR : 0 yyRR
d) None of the above
Ans:- A
55. The ratio 27: 9:9:9:3:3:3:1 is
(a) Phenotypic Trihybrid Ratio
(b) Phenotypic Dihybrid Ratio
(c)Genotypic Trihybrid Ratio
(d) Genotypic Dihybrid Ratio
Ans:- A
56. What blood group found in offspring in a marriage between blood group A man and blood group AB woman will prove man to the heterozygous?
(a) Blood Group A
(b) Blood Group B
(c) Blood Group AB
(d) Blood Group O
Ans:- B
57. Two normally pigmented parents have an albino child. Their second child is normally pigmented. What is the probability that their child is an albino?
(a)1/4
(b) 1/8
(c) 1/2
(d) 1
Ans:- B
58. The ratio 9: 7 was seen in case of
(b) Supplementary genes
(a) Complementary genes
(d) None of the above
(c) Modifier genes
Ans:- A
59. A hybrid red coloured plant was selfed and 1600 seeds were produced. How many will be red in colour ?
(b) 1600
(a) 1200
(d) 400
(c) 800
Ans:- A
60. What will be the probability of a child born to parents having blood group AB and blood group AB to be blood group AB ?
(a) 1/8
(b) 1/16
(c) 1/4
(d) 1/2
Ans:- D
61. What will never be father’s blood group if the mother has blood group B and child blood group O
(b) B
(a) A
(d) O
(c)AB
Ans:- C
(a) Homozygous
(b) Heterozygous YS
(c) Any of the above
(d) Information incomplete.
Ans:- B
63. Segregation of genes occur in
(a) Anaphase I
(n) Anaphase II
(c) Metaphase I
(d) Telophase I.
Ans:- B
64. How many out of 10 million sperms in a man with genotype AaBb will have both recessive alleles ?
(a) 2.5 million
(6) 5 million r bolt
(c) 7.5 million
(d) 10 million. bool
Ans:- A
of potatoes in a plant R,R,Rro ?
(a) 215 g
(b) 225 g
(c) 205 g
(d) 195 g
Ans:- C
(a) He would have not discovered law of segregation
(b) He would not have discovered law of independent assortment
(c) Both the above
(d) None of the above
Ans:- B
67. 1:2 : 1 is a ratio which is found in
(a) F2 genotypic ratio of a dihybrid cross
(b) Codominance
(c) Incomplete dominance
(d) All of the above
Ans:- D
(a)4
(b) 0
(d) 3/8
(c) 1/16
Ans:- C
(a)1/2
(6) 1/4
(C) 1/8
(d) 0
Ans:- A
(a) 0
(b) 1/2
(c) 1/4
(d) 1/8
Ans:- A
(6) AB
(a) A
(d) o
(c) B
Ans:- C
(b)1/4
(a) 1/2
(d) 1/16
(c) 0
Ans:- 1/2
(b) 640
(a) 32
(d) 3096
(c) 1024
Ans- 32
(b) 16
(a) 32
(d) 128
(c) 64
Ans – No. of phenotypes will be 16.