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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31. The test cross ratio shown by the genotype Tt is
(a) 9:3: 3:1
(b) 1:1
(c) 1
(d) 1:1: 1:1
Ans:- B
32. The test cross ratio shown by the genotype AABBCCDdEE will be
(a) 1:1
(b) 1: 1:1:1
(c) 1:1:1:1:1:1:1:1
(d) 1
Ans:- A
33. The number of genotypic recombinations possible due to the 3 alleles in case of human blood group system are
(a) 4
(b)6
(c) 8
(d) 12
Ans:- B
34. The number of types of phenotypes formed in case of polygeny dealing with human skin colour is
(a) 5
(b) 7
(c) 8
(d)8
Ans:- B
35. The phenotypic ratio in the F2 generation of a case of polygeny dealing with two pairs of polygenes is
(a) 1:2: 1
(6) 9:3:3:1
C)1:4:6:4:1
(d) 1:6:15: 20: 15:6:1
Ans:- C
36. Who proposed the experimental evidence of polygenic inheritance ?
(a) Davenport
(b) Kolreuter
(c) Nilson-Ehle
(d) None of the above
Ans:- C
37. In biparental reproduction, the offspring
(a) Differs from both the parents
(b) Shows no change from the maternal parent
(C) Shows no change from the paternal parent
(d) Shows mixtures of characters from both parents
Ans:- D
38. Mendel was
(a) A physiologist
(b) A plant breeder
(c) A cytologist
(d) A taxonomist
Ans:- B
39, Mendel is famous for his experiments on
(a) Pisum sativum
(b) Drosophila melanogaster
(d) Oenothera lamarckiana
(c) Neurospora crassa
Ans:- A
40. Which of the following represents a pair of contrasting characters?
(a) Allele (or allelomorphs)
(b) Phenotype
(c) Homozygous
(d) Heterozygous
Ans:- A
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