Principles of Inheritance and Variation Book Back Practice Test

12th Standard Zoology — Principles of Inheritance and Variation: Book Back Online Practice Test

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Haemophilia is more common in males because it is a

A.Recessive character carried by Y-chromosome B.Dominant character carried by Y-chromosome C.Dominant trait carried by X-chromosome D.Recessive trait carried by X-chromosome

ABO blood group in man is controlled by

A.Multiple alleles B.Lethal genes C.Sex linked genes D.Y-linked genes

Three children of a family have blood groups A, AB and B. What could be the genotypes of their parents?

A.IA IB and Io Io B.IA Io and IB Io C.IB IB and IA IA D.IA IA and Io Io

Which of the following is not correct?

A.Three or more alleles of a trait in the population are called multiple alleles. B.A normal gene undergoes mutations to form many alleles. C.Multiple alleles map at different loci of a chromosome. D.A diploid organism has only two alleles out of many in the population.

Which of the following phenotypes in the progeny are possible from the parental combination AxB?

A.A and B only B.A,B and AB only C.AB only D.A,B,AB and O

Which of the following phenotypes is not possible in the progeny of the parental genotypic combination IAIO X IAIB?

A.AB B.O C.A' D.B'

Which of the following is true about Rh factor in the offspring of a parental combination DdxDd (both Rh positive)?

A.All will be Rh-positive B.Half will be Rh positive C.About 3/4 will be Rh negative D.About one fourth will be Rh negative

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

A.AB only B.A, B and AB C.A, B, AB and O D.A and B only

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

A.IA IA and IB Io B.IA Io and IB Io C.IA Io and IoIo D.IoIo and IB IB

Q10

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

A.Male heterogamety B.Female heterogamety C.Male homogamety D.Both (b) and (c)

Q11

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?

A.O and Rh negative B.O and Rh positive C.B and Rh negative D.AB and Rh positive

Q12

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

A.25% B.50% C.100% D.75%

Q13

A marriage between a colourblind man and a normal woman produces

A.All carrier daughters and normal sons B.50% carrier daughters and 50% normal daughters C.50% colourblind sons and 50% normal sons D.All carrier offsprings

Q14

Down's syndrome is a genetic disorder which is caused by the presence of an extra chromosome number

A.20 B.21 C.4 D.23

Q15

Klinefelters' syndrome is characterized by a karyotype of

A.XYY B.XO C.XXX D.XXY

Q16

Females with Turners' syndrome have

A.Small uterus B.Rudimentary ovaries C.Underdeveloped breasts D.All of these

Q17

Pataus' syndrome is also referred to as

A.13-Trisomy B.18-Trisomy C.21-Trisomy D.None of these

Q18

"Universal Donor" and "Universal Recipients" blood group are _____ and_______respectively

A.AB, O B.O, AB C.A, B D.B, A

Q19

ZW-ZZ system of sex determination occurs in

A.Fishes B.Reptiles C.Birds D.All of these

Q20

Co-dominant blood group is

A.A' B.AB C.B' D.O

Q21

Which of the following is incorrect regarding ZW-ZZ type of sex determination?

A.It occurs in birds and some reptiles B.Females are homogametic and males are heterogametic C.Male produce two types of gametes D.It occurs in gypsy moth

Q22

Who is the founder of Modern Eugenics movement?

A.Mendel B.Darwin C.Francis Galton D.Karl Pearson

Q23

Improvement of human race by encouraging the healthy persons to marry early and produce large number of children is called

A.Positive eugenics B.Negative eugenics C.Positive euthenics D.Positive euphenics

Q24

The _______deals with the control of several inherited human diseases especially inborn errors of metabolism

A.Euphenics B.Eugenics C.Euthenics D.All of these

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About this Principles of Inheritance and Variation test

This free online practice test covers Principles of Inheritance and Variation from the 12th Standard Zoology (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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