MCQ ON genetic basis of inheritance class 12 for NEET

MCQ ON genetic basis of inheritance class 12 for NEET |genetic basis of inheritance class 12 | MCQ genetic basis of inheritance with Answer | Check the below NCERT MCQ question for class 12 Biology based on the with Answers.

MCQ on genetic basis of inheritance class 12 Biology with answers were prepared based on the latest pattern.We have provided class 12 Biology MCQs question with Answers to help students understand the concept very well.

MCQ ON genetic basis of inheritance is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM/ KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2023-2024 ,2025

INTRODUCTION:-
Gregor Johann Mendel is known as father of genetics. The term genetics was coined by Bateson.
Genetics is the study of principal and mechanism of heredity and variations.

Genetics has three branches :
-transmission genetics :-classical mandelian genetics studies transmission of genesfrom generation to generation.

Molecular genetics:-study genes and their working at the molecular level.

Population genetics:-studies distribution spread and changes in gene in population.

Variations:-variations are differences found in morphological physiological cytological and behaviour traits of individuals belonging to same species, race and family.

Variation occurs due to
Crossing over, chance combination of chromosomes during meiosis and fertilization.

 

MCQ GENETIC BASIS OF INHERITANCE class 12 for NEET/KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2023-2024,2025

1. The substance which cause a definite change in gene is called

(a) mutagen
(b) toxin
(c) cytotoxin
(d) alkaloid

Ans (a) mutagen

2. Exchange of segments between non homologous chromosome is

(a) translocation
(b) inversion
(c) crossing over
(d) Tetrasomy

Ans. (a) translocation

3. In a chromosome the protein content is

(a) nil
(b) trace
(c) half of DNA
(d) Same as DNA

Ans. (d) Same as DNA

4. Number of linkage in a polynucleotide would be

(a) same as number of nucleotides
(b) twice the number of nucleotides
(c) one less than the number of nucleotides
(d) one

Ans.(d) one

5. Number of chromosomes can increase or decrease due to

(a) mutation
(b) genetic repetition
(c) nondisjunction
(d) all the above

Ans.(c) nondisjunction

6. Gene is formed of

(a) poly nucleotide
(b) histone
(c) hydrocarbons
(d) lipoprotein

Ans.(a) polynucleotide

7. Which one is triploid ?

(a) mango
(b) wheat
(c) orange
(d) banana

Ans.(d) banana

8. Nobel prize for jumping gene / transposable DNA element was given to

(a) Muller
(b) Mc Clintock
(c) Morgan
(d) Kornberg

Ans.(b) Mc Clintock

9. Mutations are responsible for

(a) extinction of organisms
(b) variation in population
(c) increase in population
(d) maintaining genetic continuity

Ans. (b) variation in population

10. Hexaploid or modern wheat develop through

(a) hybridomas
(b) chromosome doubling
(c) hybridisation
(d) hybridisation and chromosome doubling

Ans. (d) hybridisation and chromosome doubling

11. Genetic identity of human male is known by

(a) nucleolus
(b) cell organelles
(c) autosomes
(d) sex chromosome

Ans.(d) sex chromosome

12. Triticum aestivum is

a) tetraploid
b) hexaploid
c) diploid
(d) haploid

Ans . (b) hexaploid

13. After crossing to plants the progeny was found to be male sterile due to maternal inheritance. The gene for male sterility resides in

(a) nucleus
(b) chloroplast
(c) cytoplasm
(d) mitochondria

Ans.(d) mitochondria

14. Change in chromosome number is called

(a) polyploidy
(b) aneuploidy
(c) chromosomal mutation
(d) somatic mutations

Ans. (c) chromosome mutation

15.In Down’s syndrome of a male child, the sex complement is

(a) XO
(b) XY
(c) XX
(d) XXY

Ans.(b) XY

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16. Where are barr bodies found ?

(a) ova
(b) sperms
(c) somatic cells of man
(d) somatic cells of woman

Ans.(d) somatic cells of woman