Human Genetics Test 2

Total Questions:50 Total Time: 60 Min

Remaining:

 

Questions 1 of 50

Question:The number ot autosomes present in the sperm of human male is :

Answers Choices:

22 pairs

46

22

23

Questions 2 of 50

Question:Trisomic condition of Down's syndrome arises due to :

Answers Choices:

Translocation

Triploidy

Non-disjunction

Diploidy

Questions 3 of 50

Question:Turner's syndrome has chromosome arrangement:

Answers Choices:

XX

XYY

XY

XO

Questions 4 of 50

Question:Which pair of chromosomes is concerned with Down syndrome?

Answers Choices:

7th

18th

21st

23rd

Questions 5 of 50

Question:Whose number of sex chromosomes is normal?

Answers Choices:

Down's syndrome

Superfemale

Klinefelter's syndrome

Turner's syndrome

Questions 6 of 50

Question:Down's syndrome/mongolism is due to:

Answers Choices:

extra sex chromosome

extra 21st chromosome

extra Y-chromosome

deficient sex chromosome

Questions 7 of 50

Question:Which one is found in males only?

Answers Choices:

X-chromosome

Y-chromosome

X + X-chromosomes

2X-chromosomes

Questions 8 of 50

Question:Sex of a human child is determined by:

Answers Choices:

sex of the sperm

size of the egg

sex chromosome of the father

sex chromosome of the mother

Questions 9 of 50

Question:Probability of four sons to a couple is:

Answers Choices:

04/Jan

1/8

16/Jan

1/32

Questions 10 of 50

Question:Genic balance theory was proposed by:

Answers Choices:

Lillie

Boveri

Bridges

Morgan

Questions 11 of 50

Question:According to genie balance theory X/A = 1.5, Drosophila individual will be:

Answers Choices:

female

male

super female

intersex

Questions 12 of 50

Question:Turner's syndrome is:

Answers Choices:

trisomy of 18th chromosome

trisomy of 21st chromosome

absence of one sex chromosome

an autosomal recessive condition

Questions 13 of 50

Question:Webbed neck is a characteristic of:

Answers Choices:

XXX

XXY

YY

XO

Questions 14 of 50

Question:Which one of the following is responsible for mental abnormalities in humans?

Answers Choices:

XXX and XY

XX and XXX

XO and XXX

XX and XO

Questions 15 of 50

Question:Barr body is associated with:

Answers Choices:

Y-chromosome

male sex only

autosome

X-chromosome

Questions 16 of 50

Question:If each somatic cell of a human male contains a single Barr body in its nucleus, the most likely genetic constitution of the person is:

Answers Choices:

XO

XXY

XYY

XXXY

Questions 17 of 50

Question:Number of Barr bodies and Y-spots in XXXXXYY karyotype are:

Answers Choices:

5 and 2

5 and 1

4 and 2

4 and 1

Questions 18 of 50

Question:Mr. Kapoor has Bb autosomal gene pair and d allele sex-linked. What shall be the proportion of Bd in sperms?

Answers Choices:

1/8

1/4

1/2

0

Questions 19 of 50

Question:A child gets sex-linked traits from:

Answers Choices:

father

mother

both father and mother

none of the above

Questions 20 of 50

Question:In Drosophila XXY represents a female but in human is an abnormal male. It shows that:

Answers Choices:

Y-chromosome is essential for male sex in human

Y-chromosome is essential for female sex determination in Drosophila

Y-chromosome is not essential for male sex determination in human

all of these

Questions 21 of 50

Question:A girl of normal vision whose father was colour blind marries a man of normal vision whose father was also colour blind. Their sons would be (of total number of sons):

Answers Choices:

all colour blind

50% colour blind

all normal

25% colour blind

Questions 22 of 50

Question:Colour blindness results from:

Answers Choices:

inverted retina

abnormal cones

absence of rods

absence of eyelids

Questions 23 of 50

Question:Ram is colour blind. What is the chance, his son will inherit colour blindness from him?

Answers Choices:

25%

50%

100%

0%

Questions 24 of 50

Question:Which of the following is a sex linked inheritance?

Answers Choices:

TB

Blindness

Rickets

Haemophilia

Questions 25 of 50

Question:Haemophilia is a genetic disorder which causes

Answers Choices:

Loss of haemoglobin

Rheumatism

Blindness

Non-clotting of blood

Questions 26 of 50

Question:Which one is genetically similar to haemophilia?

Answers Choices:

albinism

colour blindness

night blindness

none of these

Questions 27 of 50

Question:Haemophilic father and homozygous normal mother will produce children which are:

Answers Choices:

all normal

all haemophilic

all normal but carriers

some normal and some haemophilic

Questions 28 of 50

Question:If a haemophilic man marries a perfectly normal lady, the offsprings will be:

Answers Choices:

all haemophilic

all normal

haemophilic sons

haemophilic daughters

Questions 29 of 50

Question:ABO blood groups were discovered by:

Answers Choices:

Darwin

Landsteiner

Huxley

Harvey

Questions 30 of 50

Question:A person of blood group A can accept blood safely from:

Answers Choices:

A and AB

AB and O

O and A

A only

Questions 31 of 50

Question:If a sample of blood shows clumping with antiserum 'A' but not with antiserum 'B', then it is:

Answers Choices:

A group

B group

AB group

O group

Questions 32 of 50

Question:Which of the following blood groups belong to the category of universal recipient?

Answers Choices:

A

AB

B

O

Questions 33 of 50

Question:A man with type A blood group marries a woman who has AB blood. We do not know whether the man is homozygous or heterozygous for IA allele. Which one of the following types in the progeny of this couple would indicate that the man is heterozygous?

Answers Choices:

Type O

Type A

Type B

Type AB

Questions 34 of 50

Question:Rh factor was discovered by:

Answers Choices:

Huxley

Landsteiner

Weiner

Landsteiner and Weiner

Questions 35 of 50

Question:Nature of identical twins is:

Answers Choices:

polyzygotic

dizygotic

monozygotic

amphizygotic

Questions 36 of 50

Question:Fraternal twins in human beings are produced when:

Answers Choices:

two sperms fertilize an ovum and the first two blastomeres separate from each other

one sperm fertilizes an ovum and first two blastomeres separate from each other

two ova are fertilized simultaneously

egg develops parthenogenetically and first two blastomeres separate from each other

Questions 37 of 50

Question:Albinism is:

Answers Choices:

dominant

polygenic

recessive

multiple allelism

Questions 38 of 50

Question:In sickle-cell anaemia which of the following amino acids is substituted?

Answers Choices:

Glutamic acid by valine in \(\alpha \)chain

Valine by glutamic acid in \(\beta \) chain

Valine by glutamic acid in \(\alpha \)chain

Glutamic acid by valine in \(\beta \)chain

Questions 39 of 50

Question:Select the one hereditary disease which is carried on autosomes:

Answers Choices:

haemophilia

\({G_6}\)-PD deficiency

sickle-cell anaemia

colour blindness

Questions 40 of 50

Question:Who has discovered the taste-blindness of phenyl thiocarbamide (PTC)?

Answers Choices:

Foiling

Fox

Garrod

Levan

Questions 41 of 50

Question:Who is called 'The father of Eugenics'?

Answers Choices:

Galton

Mendel

Garrod

Jenner

Questions 42 of 50

Question:Which one is true about tubectomy?

Answers Choices:

cutting the testis

blocking of the vasa deferentia

blocking of fallopian tubes

to make man sterile

Questions 43 of 50

Question:Which of the following is used in getting specific part in genetic engineering?

Answers Choices:

Ligases

Restriction endonuclease

Lipid

Protein

Questions 44 of 50

Question:The transfer of genetic material of one bacteria to another is called:

Answers Choices:

Translation

Transduction

Replication

Transcription

Questions 45 of 50

Question:A colour blind daughter is born when:

Answers Choices:

mother is carrier, father is colour blind

father is colour blind, mother is normal

mother is colour blind, father is normal

mother is carrier, father is normal

Questions 46 of 50

Question:Identical twins are born when:

Answers Choices:

one sperm fertilizes two ova

one ovum is fertilized by two sperms

two ova are fertilized

one fertilized ovum divides into two blasto-meres and both of them separate

Questions 47 of 50

Question:One child is haemophilic (sex-linked trait), whereas its fraternal twin brother is normal. Which one of the following informations is most appropriate?

Answers Choices:

The other child is a female and the father is haemophilic

The haemophilic child is a male

The mother must have been heterozygous

The child is a monozygotic twin

Questions 48 of 50

Question:The technique by which 'Dolly' the sheep obtained is termed as:

Answers Choices:

cloning by tissue culture of somatic cells

cloning by nuclear transfer

cloning by gene transfer

cloning without the help of gametes

Questions 49 of 50

Question:A diseased man marries a normal woman. They get three daughters and five sons. All the daughters were diseased and sons were normal. The gene of this disease is:

Answers Choices:

Y linked character

sex linked recessive

sex linked dominant

autosomal dominant

Questions 50 of 50

Question:Polydactyly in man is due to:

Answers Choices:

autosomal dominant gene

autosomal recessive gene

sex-linked dominant gene

sex-linked recessive gene