Question # 1

Which of these traits zigzags from meternal grand father through a carrier daughter to a grandson ?

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autosomal

X-linked

Y-linked

X and Y linked

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

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Histidine

Valine

Proline

Leucine

Bilirubin

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Turns skin Yellow

Damages brain cells

Causes jaundice

All of these

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%

Point mutation occurs in

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Sickle cell anemia

Phenylketonuria

Alkaptonuria

All

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%

What is the 5th amino acid in sickle cell beta chain

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Histidine

Proline

Leucine

Valine

Mutation of one or two N-bases is

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Inversion

Point mutation

Deletion

Chromosomal aberrations

Mutation may be caused by

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Chemicals

Radiations

Mutagens

All of these

A change in one or more bases of DNA, which results in the formation of an abnormal protein is

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Moulting

Transformation

Mutation

Fission

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

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

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Morgan

Bridges

Correns

De Varies

Degenerated testes are present in abdomen in which of these cases

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Down's syndrome

Klinefelter's sysndrome

Turner's syndrome

Testicular ferminization

Sickle cell mutation affects

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One beta chain

Both beta chains

Only alpha chain

None of the alpha or beta chain

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

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dominance

incomplete dominance

over dominance

codominance

Mutatuons are inherited only if they occur in the

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Gland cells

Gametes

Muscle cells

Somatic cells

The two linked genes A and B with a 30% recombination frequency must be

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15 units apart

30 units apart

60 units apart

90 units apart

A phenotype which can't be expressed in heterozygous state but can only be expressed other in homo or hemi form, would be

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Dominant

Bombay

Recessive

Ordinary

How many kinds of rhodopsins, a blue cone monochromate will have

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3

2

1

No rhodopsins

There are ________ total possible genotypes of blood group ABO system

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3

4

6

7

Interaction of two loci

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Pleiotropy

Epistasis

Dominance

Differentiation

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