12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A
Published on: 05/11/2020
12th Standard Zoology - Principles of Inheritance and Variation English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021
Download Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
One gene 'L' controlling blood groups is named after_________.
c. B. Bridges
Henking
Landsteiner
Stevens
2.
The gene responsible for ________ is inherited as an autosomal recessive lethal gene in man
Huntington's chorea
Albinism
Colourblindness
Phenylketonuria
3.
__________ are examples of mendelian disorders.
Thalassemia
Albinism
Phenylketonuria
Haemophilia
4.
Sex index is applicable to ________.
Homogenetic condition
Heterogametic condition
Genic balance
Gynandromorphs
5.
The secretors have the I allele in _______.
tears
Gastric juice
Saliva
All of these
6.
Which of the following is incorrect regarding ZW-ZZ type of sex determination?
It occurs in birds and some reptiles
Females are homogametic and males are heterogametic
Male produce one type of gamete
It occurs in gypsy moth
7.
ZW-ZZ system of sex determination occurs in _____.
Fishes
Reptiles
Birds
All of these
8.
The _______deals with the control of several inherited human diseases especially inborn errors of metabolism
Euphenics
Eugenics
Euthenics
All of these
9.
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
10.
Which of the following phenotypes is not possible in the progeny of the parental genotypic combination IAIO x IAIB?
AB
O
A
B
11.
1.
(c)
Landsteiner
2.
(b)
Albinism
3.
(d)
Haemophilia
4.
(c)
Genic balance
5.
(d)
All of these
6.
(b)
Females are homogametic and males are heterogametic
7.
(d)
All of these
8.
(a)
Euphenics
9.
(b)
A, B and AB
10.
(b)
O
11.
(a)
12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications களப்பெயர் முறைமை (DNS) Sample Question Papers Study Material - QB365 Set A
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NEW12th Standard
TN 12th Computer Applications கணினி வலையமைப்பு ஓர் அறிமுகம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications PHP-உடன் MySQL-ஐ இணைத்தல் Sample Question Papers Study Material - QB365 Set A
Tamilnadu Stateboard 12th Standard Subjects
Maths
Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
English
French
Tamilnadu Stateboard Standards
