Question # 1

Pseudo-autosomal genes are present on

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X-chromosome

Y-chromosome

Both a & b

Autosomes

Which of the following traist is transmitted directly from an affected to only its sons?

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autosomal

X-linked

Y-linked

X and Y linked

A carrier mother for colour blindness does not have

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A normal boy

A carrier boy

A colour blind boy

A normal daughter

In case of sickle cell anemia, in place of glutamic acid, _________ is found

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Histidine

Valine

Proline

Leucine

Mutation of one or two N-bases is

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Inversion

Point mutation

Deletion

Chromosomal aberrations

In sickle cell beta chain glutamic acid is replaced by valine which is sixth amino acid from

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N-Terminal

C-Terminal

R-Terminal

H-Terminal

What happens when both alleles of a gene pair independently express in a heterozygote?

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dominance

incomplete dominance

over dominance

codominance

What will be the risk of heamophilia in sons if father is haemophilic and mother is normal

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0%

20%

25%

50%

Which phenomenon reduces the chances of genetic recombination and variations among offspring ?

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linkage

crossing over

independent assortment

dominance

Which enzyme deficiency leads to phenylketonuria

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Phenylalanine oxidase

Phenylalanine hydroxylase

Phenylalanine synthase

Phenylalanine carboxylase

Blood pressure is also an example of _______ trait

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Multifactorial

Qualitative

Single genic

Both a & b

SRY in located at the tip of

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Short arm of X-chromosome

Short arm of Y-chromosome

Long arm of Y-chromosome

Long arm of X-chromosome

What is the probability of having albino child if father and mother both are carrier(Aa)

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25%

30%

50%

75%

Mutation may be caused by

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Chemicals

Radiations

Mutagens

All of these

Interaction of two loci

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Pleiotropy

Epistasis

Dominance

Differentiation

If six cells out of 10, do crossing over what will be percentage of cross over gametes

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60%

30%

40%

50%

Who for the first time found white eye mutant in drosophila ?

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Morgan

Bridges

Correns

De Varies

Two parents of blood group A had a child of blood group O, what will be percentage chances of having such child again

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25%

50%

75%

None

There are ________ total possible genotypes of blood group ABO system

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3

4

6

7

Queen victoria was having which kind of haemophilia

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A

B

C

None

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