If you are preparing for CBSE Class 12 Board Exam Term 1 which will be an objective type questions paper, then you need to practice multiple choice questions of Class 12 Biology Chapterwise. In this article of AKVTutorials, you will get MCQ Questions for Class 12 Biology Chapter 5 Principles of Inheritance and Variations with Answer Keys
MCQ Questions for Class 12 Biology Chapter 5 Question No 1:
In sickle cell anaemia glutamic acid is replaced by valine. Which one of the following triplets codes for valine?
Option A : GGG
Option B : AAG
Option C : GAA
Option D : GUG
Show/Hide Answer
Option D : GUG
MCQ Questions for Class 12 Biology Chapter 5 Question No 2:
ZZ/ZW type of sex determination is seen is
Option A : Platypus
Option B : Snails
Option C : Cockroach
Option D : Peacock
Show/Hide Answer
Option A : +16C
MCQ Questions for Class 12 Biology Chapter 5 Question No 3:
In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that
Option A : The alleles of two genes are interacting with each other
Option B : It is a multigenic inheritance
Option C : It is a case of multiple allelism
Option D : The alleles of two genes are segregating independently
Show/Hide Answer
Option D : The alleles of two genes are segregating independently
MCQ Questions for Class 12 Biology Chapter 5 Question No 4:
Mendel’s Law of independent assortment holds good for genes situated on the
Option A : Non- Homologous chromosomes
Option B : Homologous chromosomes
Option C : Extra nuclear genetic element
Option D : Same chromosome
Show/Hide Answer
Option A : Homologous chromosomes
MCQ Questions for Class 12 Biology Chapter 5 Question No 5:
Occasionally a single gene may express more than one effect. The Phenomenon is called
Option A : Multiple allelism
Option B : Mosaicism
Option C : Pleiotropy
Option D : Polygeny
Show/Hide Answer
Option C : Pleiotropy
MCQ Questions for Class 12 Biology Chapter 5 Question No 6:
In the F2 generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are
Option A : Phenotypes- 4, Genotypes-16
Option B : Phenotypes- 9, Genotypes-4
Option C : Phenotypes- 4, Genotypes-8
Option D : Phenotypes- 4, Genotypes-9
Show/Hide Answer
Option D : Phenotypes- 4, Genotypes-9
MCQ Questions for Class 12 Biology Chapter 5 Question No 7:
______pairs of contrasting traits were studied by Mendel in pea plant
Option A : 6
Option B : 7
Option C : 8
Option D : 10
Show/Hide Answer
Option B : 7
MCQ Questions for Class 12 Biology Chapter 5 Question No 8:
Which of the following characters was not chosen by Mendel?
Option A : Pod shape
Option B : Pod colour
Option C : Location of Flower
Option D : Location of Pod
Show/Hide Answer
Option D : Location of Pod
MCQ Questions for Class 12 Biology Chapter 5 Question No 9:
Genes which code for a pair of contrasting traits are known as
Option A : Dominant genes
Option B : Alleles
Option C : Linked genes
Option D : None of these
Show/Hide Answer
Option B : Alleles
MCQ Questions for Class 12 Biology Chapter 5 Question No 10:
A recessive allele is expressed in
Option A : Heterozygous condition only
Option B : Homozygous condition only
Option C : F3 generation
Option D : Both homozygous and heterozygous condition
Show/Hide Answer
Option B : Homozygous condition only