CHAPTER 4 PRINCIPLES OF INHERITANCE AND VARIATION - CLASS 12 BIOLOGY ZOOLOGY - 1 MARK QUESTIONS - ONLINE TEST

ப்ளஸ் டூ படிக்கும் மாணவர்களுக்கு இந்தத் தேர்வு பயனுள்ளதாக இருக்கும். இந்த யூ ட்யூப் தளத்தில் வரும் ஆடியோவை ப்ளே செய்து மீண்டும் மீண்டும் கேளுங்கள். ஆடியோவை கேட்கும் பொழுதே கீழே உள்ள கேள்வி பதில்களை SCROLL செய்து உற்று நோக்குங்கள். பிறகு கேள்விகளில் உள்ள சரியான விடையை தேர்ந்தெடுத்து கடைசியாக SUBMIT செய்யுங்கள். நீங்கள் எடுத்த மதிப்பெண் வரும் அந்த மதிப்பெண்ணை கீழே உள்ள கமெண்ட் பாக்ஸ் இல் பதிவு செய்யுங்கள். மதிப்பெண் குறைந்தால் மீண்டும் ஒருமுறை முயற்சி செய்யுங்கள்... வாழ்த்துக்கள் மாணவர்களே...அன்புடன் - K.K.D.

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1.

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

2.

ABO blood group in man is controlled by

a) Multiple alleles

b) Lethal genes

c) Sex linked genes

d) Y-linked genes

3.

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 IBIO

c) IB IB and IA IA

d) IA IA and IO IO

4.

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.

5.

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

6.

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

7.

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 ¾ will be Rh negative.

d) About one fourth will be Rh negative.

8.

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.

9.

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.

10.

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)

11.

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.

12.

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%.

13.

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.

c) 50% colourblind sons and 50% normal sons.

14.

Mangolism is a genetic disorder which is caused by the presence of an extra chromosome number

a) 20.

b) 21.

c) 4.

d) 23.

15.

Klinefelters’ syndrome is characterized by a karyotype of...

a) XYY.

b) XO.

c) XXX.

d) XXY.

16.

Females with Turners syndrome have...

a) Small uterus.

b) Rudimentary ovaries.

c) Under developed breasts.

d) All of these.

17.

Pataus’ syndrome is also referred to as...

a) 13-Trisomy.

b) 18-Trisomy.

c) 21-Trisomy.

d) None of these.

18.

Universal Donor and Universal Recipients blood group are _____ and_______respectively.

a) AB, O.

b) O, AB.

c) A, B.

d) B, A.

19.

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

a) Fishes.

b) Reptiles.

c) Birds.

d) All of these.

20.

Co-dominant blood group is

a) A.

b) AB.

c) B.

d) O.

21.

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) Males produce one types of gamete.

d) It occurs in gypsy moth.

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