Maharashtra State Board Question Bank 2021- Biology Chapter 3- Inheritance and Variation

 Chapter 3- Inheritance and Variation

MCQ

1 The three principles of Mendelism are 

A. Dominance, segregation and independent assortment

B. Linkage, segregation and independent assortment

C .Linkage, dominance and segregation

D. Linkage, dominance and Independent assortment.

2 Which one of the following is back cross?

A. F1 × F1

B. F1 × Recessive parent

C. F1 × Dominant parent

D. F1 × Any parent

3 RR (Red) Antirrhinum is crossed with white (WW) one. Offspring (RW) are pink .This is an example of

A. Dominant -recessive

B. Incomplete dominance

C. Hybrid

D. Supplementary genes

4 The word chromosome was coined by

A. Benda

B. Waldeyer

C. Robert Hooke

D. T.H.Morgan

5 Nullisomy is represented by.....

A. (2n-1)

B. (2n-2)

C.(2n+1)

D.(2n+2)

6 Identify the odd one:-

A. Monoploidy

B.Diploidy

C.Polyploidy

D.Hyperploidy

7 In humans, the sex chromosome complement is

A.XX-XY

B. XX-XO

C.ZZ-ZO

D. ZW-ZZ

8 A family has five daughters and expecting sixth child. The chance of its beings a son is ……

A. zero

B.25%

C.50%

D. 100%

9 In human beings 45 chromosomes/single

X/XO abnormality causes

A. Down's syndrome

B. Klinfelter's syndrome

C. Turner's syndrome

D. Edward's syndrome

10 Webbed neck is characteristic of …

syndrome.

A.XXX

B. YY

C. XXY

D. XO