Samacheer Kalvi 12th Principles of Inheritance and Variation - 1

Question: 1

XO type of sex determination and XY type of sex determination are examples of

(A) Female heterogamety

(B) Male homogamety

(C) Male heterogamety

(D) Both (b) and (c)

Question: 2

Who is the founder of Modem Eugenics movement?

(A) Karl pearson

(B) Fransis Galton

(C) Darwin

(D) Mendel

Question: 3

ZW-ZZ system of sex determination occurs in

(A) Birds

(B) Reptiles

(C) Fishes

(D) All of these

Question: 4

ABO blood group is a classical example for

(A) Polygenic mechanism

(B) Pleotropism

(C) Incomplete dominance

(D) Multiple allelism

Question: 5

DOPA stands for

(A) 3,4 – dihydroxy phenyle alanine

(B) 3,4 – dihydroxy phenyl acetate

(C) 3,4 – dihydroxy phenyl asparate

(D) 3,4 – dihydroxy phenyle aldehyde

Question: 6

IA and IB genes of ABO blood group are

(A) Co-dominant

(B) Pleotropic

(C) Dominant and recessive

(D) Epistatic

Question: 7

Haemophilia is more common in males because it is a

(A) Recessive trait carried by X-chromosome

(B) Dominant trait carried by X-chromosome

(C) Dominant character carried by Y-chromosome

(D) Recessive character carried by Y-chromosome