TN State Board Samacheer Kalvi Online Test for 12th Std - Bio Zoology - English - Principles of Inheritance and Variation

Question 1 Of 10

ZW-ZZ system of sex determination occurs in………………

Fishes Reptiles Birds All of these

Question 2 Of 10

Females with Turners’syndrome have………………

Small uterus Rudimentary ovaries Underdeveloped breasts All of these

Question 3 Of 10

Identify the correct statement.

Homozygous sex chromosome (XX) produce males in Drosophila Homozygous sex chromosome (ZZ) determine female sex in birds Heterozygous sex chromosome (XO) determine male sex in grasshopper Heterozygous sex chromosome (ZW) determine male sex in gypsy moth

Question 4 Of 10

What can be the blood group of offspring when both parents have AB blood group?

AB only A, B and AB A, B, AB and O A and B only

Question 5 Of 10

Father of a child is colourblind and mother is carrier for colourblindness, the probability of the child being colourblind is ………………

25% 50% 100% 75%

Question 6 Of 10

ABO blood group is a classical example for ………………..

Multiple allelism Pleotropism Incomplete dominance Polygenic mechanism

Question 7 Of 10

Identify the incorrect statement regarding haplodiploidy.

Unfertilized eggs develop into drones Fertilized eggs develop into queen and worker bees Males have half the total chromosomal number Haplodiploidy is noticed in honeybees and drosophila

Question 8 Of 10

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

Male heterogamety Female heterogamety Male homogamety Both (b) and (c)

Question 9 Of 10

A co-dominant blood group is

A AB B O

Question 10 Of 10

Which one of the following crosses show 3 : 1 ratio of normal visioned versus carrier blind?

XCXC x X+Y X+ XC x XC Y– X+XC x X+Y– X+X+ x XCY–

Tamil Nadu State Board ( Samacheer Kalvi ) Online Test based on Book Back Questions - 12th Standard Bio Zoology - English Medium - Principles of Inheritance and Variation

Samacheer Kalvi 12th Bio Zoology - Principles of Inheritance and Variation - Book Back Questions in English Medium