MCQ Class 12 Biology Chapter 4 Principles of Inheritance and Variation

MCQ’s For All Chapters – Biology Class 12th

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. The phenotypic ratio in the F₂ generation of a dihybrid cross is

1:2:2:4:1:2:1:2:1

9:3:3:1

7:1:1:7

12:3:4

Question 1 of 10

2. Cytoplasmic inheritance is due to
(1) Mitochondria
(2) Cilia
(3) Cytoplasmic particles
(4) Cell wall

1 and 2 are correct.

1 and 3 are correct.

1, 2 and 3 are correct.

2 and 4 are correct.

Question 2 of 10

3. A pure tall and a pure dwarf plant were crossed to produce offspring. Offspring were self-crossed. Find out the ratio between true breeding tall to true breeding dwarf.

3:1

1:1

2:1

1:2:1

Question 3 of 10

4. The term ‘Genetics’ was proposed by

Johannsen

Morgan

Mendel

Bateson

Question 4 of 10

5. Genes present in the cytoplasm of eukaryotic cells are found in

Golgi bodies and smooth endoplasmic reticulum

Mitochondria and inherited via egg cytoplasm

Plastids and inherited via male gamete

Lysosomes and peroxisomes

Question 5 of 10

6. The gene which controls many characters is called

Pleiotropic gene

Co-dominant gene

Multiple gene

Polygene

Question 6 of 10

7. Heterozygous purple flower is crossed with recessive white flower. The progeny has the ratio:

All purple

All white

75% purple and 25% white

50% purple and 50% white

Question 7 of 10

8. Mating of an organism to a double recessive in order to determine whether it is homozygous or heterozygous for a character under consideration is called

Back cross

Dihybrid cross

Reciprocal cross

Test cross

Question 8 of 10

9. Which of the following is not a Mendelian disorder?

Haemophilia

Turner's syndrome

Cystic fibrosis

Colour blindness

Question 9 of 10

10. Which of the blood groups can be given to any person?

O

B

A

AB

Question 10 of 10

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