Bihar Board - Class 12 Biology - Chapter 5: Principles Of Inheritance And Variation Multiple Choice Questions(MCQs)

1. Which of the following truly represents a heterozygous organism? 
(a) XXyy 
(b) RRYY 
(c) xxYY
(d) RrYy
Answer:d Topic:Mendel’s law of inheritance
Class: 12 Chapter name:Principles of inheritance and variation
Level: moderate
Question id:12BEV1

2.Which of the following statements is true about Mendel? 
(a) His discoveries concerning genetic inheritance were generally accepted by the scientific community when published them during the mid 19th century x
(b)He believed that genetic traits of parents will usually blend in their children
(c) His ideas about genetics apply equally to plants and animals
(d) He discovered linkage 
Answer:c
Topic:Mendel’s law of inheritance
Class: 12
Chapter name:Principles of inheritance and variation
Level: hard
Question id:12BEV2


3. How many types of gametes will be produced by individuals having genotype AaBbCc?
(a) Two
(b) Four
(c) Six
(d)Eight
Answer:d
Topic:Mendel’s law of inheritance
Class: 12
Chapter name:Principles of inheritance and variation
Level: moderate
Question id:12BEV10


4.Who is considered as father of genetics 
(a) Hugo de Vries 
(b) Morgan
© mendel
(d) Darwin
Answer:c
Topic:Mendel’s law of inheritance
Class: 12
Chapter name:Principles of inheritance and variation
Level: moderate
Question id:12BEV22


5.A test cross enables one to 
(a) determine the viability of cross
(b) distinguish between homozygous dominant and heterozygous dominant
(c) determine whether two species can interbreed 
d) determine the similarities in the DNA of two species
Answer:b
Topic:Inheritance of one gene( law of dominance, law of segregation, incomplete dominance, codominance)
Class: 12 Chapter name:Principles of inheritance and variation


6. In Mirabilis jalapa, the number of F2 red flowered plants is a cross of red flowered X white havered would be- 
(a) 1 
(b) 2 
(c) 3 
(d) 4 
Answer:b
Topic:Inheritance of one gene( law of dominance, law of segregation, incomplete dominance, codominance)
Class: 12
Chapter name:Principles of inheritance and variation
Level: moderate
Question id:12BEV26


7.Which of the following genes have similar genotypic effect when present separately but produce different traits after interacting together and give a ratio of 9: 7 in F2 generation?
(a)Complementary genes 
(b)Jumping genes
(c) Duplicate genes 
(d) House-keeping genes
Answer:a
Topic:Inheritance of one gene( law of dominance, law of segregation, incomplete dominance, codominance)
Class: 12
Chapter name:Principles of inheritance and variation
Level: moderate
Question id:12BEV31


8.In a red and white-flowered cross of Mirabilis jalapa, F, generation has red, pink and white-flowered plants in the ratio
A) 1:2:1
(b) 1:1: 2
(c) 1:2:1
(d) 1 :0:1 
Answer:c
Topic:Inheritance of one gene( law of dominance, law of segregation, incomplete dominance, codominance)
Class: 12
Chapter name:Principles of inheritance and variation
Level: moderate
Question id:12BEV33


9.An allele is dominant, if it is expressed in-
(a) second generation
(b) homozygous combination
(e) heterozygous combination 
(d) both homozygous and heterozygous conditions
Answer:d
Topic:Inheritance of one gene( law of dominance, law of segregation, incomplete dominance, codominance)
Class: 12
Chapter name:Principles of inheritance and variation
Level: moderate
Question id:12BEV35


10.Multiple alleles control the character of
(a) only skin color 
(b) only blood groups
(c) blood groups and skin color
(d) sickle-cell
Answer:b
Topic:Inheritance of two genes(law of independent assortment, chromosomal theory of inheritance, linkage and recombination)
Class: 12
Chapter name:Principles of inheritance and variation
Level: moderate
Question id:12BEV41

हिंदी के सभी अध्याय के महत्वपूर्ण प्रशन उत्तर के लिए अभी Download करें Vidyakul App - Free Download Click Here