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Published on: 26/08/2022
QB365 provides a detailed and simple solution for every Possible Book Back Questions in Class 12 Biology Subject - Zoology - Principles of Inheritance and Variation, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.
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.
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
2.
Co-dominant blood group is ______.
A
AB
B
O
3.
ZW-ZZ system of sex determination occurs in _____.
Fishes
Reptiles
Birds
All of these
4.
“Universal Donor” and “Universal Recipients” blood group are _____and_______respectively
AB, O
O, AB
A, B
B, A
5.
The _______deals with the control of several inherited human diseases especially inborn errors of metabolism
Euphenics
Eugenics
Euthenics
All of these
6.
Improvement of human race by encouraging the healthy persons to marry early and produce large number of children is called
Positive eugenics
Negative eugenics
Positive euthenics
Positive euphenics
7.
Who is the founder of Modern Eugenics movement?
Mendel
Darwin
Francis Galton
Karl pearson
8.
Pataus syndrome is also referred to as ______.
13-Trisomy
18-Trisormy
21-Trisormy
None of these
9.
Females with Turners syndrome have ______.
Small uterus
Rudimentary ovaries
Underdeveloped breasts
All of these
10.
Klinefelters syndrome is characterized by a karyotype of ____.
XYY
XO
XXX
XXY
11.
12.
A marriage between a colourblind man and a normal woman produces _______.
All carrier daughters and normal sons
50% carrier daughters, 50% normal daughters
50% colourblind sons, 50% normal sons
All carrier offsprings
13.
Father of a child is colourblind and mother is carrier for colourblindness, the probability of the child being colourblind is _____.
25%
50%
100%
75%
14.
In an accident there is great loss of blood and there is no time to analyse the blood group which blood can be safely transferred?
O and Rh negative
O and Rh positive
B and Rh negative
AB and Rh positive
15.
XO type of sex determination and XY type of sex determination are examples of ______.
Male heterogamety
Female heterogamety
Male homogamety
Both (b) and (c)
16.
If the childs blood group is ‘O’ and fathers blood group is ‘A’ and mother’s blood group is ‘B’ the genotype of the parents will be ______.
IA IA and IB Io
IA Io and IB Io
IA Io and IoIo
IoIo and IB IB
17.
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
18.
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
19.
Which of the following phenotypes is not possible in the progeny of the parental genotypic combination IAIO x IAIB?
AB
O
A
B
20.
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
21.
Which of the following is not correct?
Three or more alleles of a trait in the population are called multiple alleles
A normal gene undergoes mutations to form many alleles
Multiple alleles map at different loci of a chromosome
A diploid organism has only two alleles out of many in the population
22.
Three children of a family have blood groups A, AB and B. What could be the genotypes of their parents?
IA IB and IoIo
IA Io and IBIo
IB IB and IA IA
IA IA and IoIo
23.
24.
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
1.
(b)
Females are homogametic and males are heterogametic
2.
(b)
AB
3.
(d)
All of these
4.
(b)
O, AB
5.
(a)
Euphenics
6.
(a)
Positive eugenics
7.
(c)
Francis Galton
8.
(a)
13-Trisomy
9.
(d)
All of these
10.
(d)
XXY
11.
(b)
12.
(a)
All carrier daughters and normal sons
13.
(b)
50%
14.
(a)
O and Rh negative
15.
(a)
Male heterogamety
16.
(b)
IA Io and IB Io
17.
(b)
A, B and AB
18.
(d)
About one fourth will be Rh negative
19.
(b)
O
20.
(d)
A, B, AB and O
21.
(c)
Multiple alleles map at different loci of a chromosome
22.
(b)
IA Io and IBIo
23.
(a)
24.
(d)
Recessive trait carried by X-chromosome
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Physics

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Business Maths and Statistics

Economics

Commerce

Accountancy

History

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Biology

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Computer Applications

Computer Science

Business Maths and Statistics

Commerce

Economics

Maths

Chemistry

Physics

Computer Technology

History

Accountancy

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