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Published on: 27/08/2019
Zoology - Principles of Inheritance and Variation
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.
XX - XO type of sex determination is in ______.
Cockroaches
Drosophila
Humans
Moths
2.
_________ proposed the existence of 8 alleles at a single Rh locus.
Fischer
Landsteiner
Bernstein
Wiener
3.
The secretors have the I allele in _______.
tears
Gastric juice
Saliva
All of these
4.
The__________ is called null allele.
IA
IOIB
IO
IBIB
5.
The inheritance of blood group is determined by multiple alleles as discovered by _________.
Landsteiner
Bernstein
Alexander castelle
lyon
6.
The ABO blood group was discovered by ________.
Sturli
Decastelle
Landsteiner
Alexander wiener
7.
Which of the following is true about Rh factor in the offspring of a parental combination DdxDd (both Rh positive)?
All will be Rh-positive
Half will be Rh positive
About ¾ will be Rh negative
About one fourth will be Rh negative
8.
Which of the following phenotypes is not possible in the progeny of the parental genotypic combination IAIO x IAIB?
AB
O
A
B
9.
Which of the following phenotypes in the progeny are possible from the parental combination AxB?
A and B only
A,B and AB only
AB only
A, B, AB and O
10.
Haemophilia is more common in males because it is a ______.
Recessive character carried by Y-chromosome
Dominant character carried by Y-chromosome
Dominant trait carried by X-chromosome
Recessive trait carried by X-chromosome
11.
R1
12.
I
13.
Lyon
14.
3n female
15.
XO females
1.
(a)
Cockroaches
2.
(d)
Wiener
3.
(d)
All of these
4.
(c)
IO
5.
(b)
Bernstein
6.
(c)
Landsteiner
7.
(d)
About one fourth will be Rh negative
8.
(b)
O
9.
(d)
A, B, AB and O
10.
(d)
Recessive trait carried by X-chromosome
11.
Wiener
12.
Landsteiner
13.
Barr body
14.
Bridges
15.
Aneuploidy
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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
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