Question # 1

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

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dominance

incomplete dominance

over dominance

codominance

When a haemophilic carrier woman marries a normal man, who among her offspring may be affected

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all her children

all her daughter

half of her daughter

half of her sons

Man has ____________ linkage group

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23

21

25

46

Rh factor is encoded by

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2 genes which occupy 3 loci

3 genes which occupy 2 loci

2 genes which occupy 2 loci

3 genes which occupy 3 loci

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

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3

2

1

No rhodopsins

Genes can be mapped on chromosomes on the basis of

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Sex linkage

Assortment

Recombination frequency

Gene sequencing

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

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Histidine

Proline

Leucine

Valine

Which enzyme deficiency leads to phenylketonuria

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Phenylalanine oxidase

Phenylalanine hydroxylase

Phenylalanine synthase

Phenylalanine carboxylase

Mutation of one or two N-bases is

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Inversion

Point mutation

Deletion

Chromosomal aberrations

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

Interaction of two loci

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Pleiotropy

Epistasis

Dominance

Differentiation

Which of the following traits is not sex-linked recessive ?

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haemophilia

colour blindness

hypophosphatemic ricket

tfm syndrome

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

Which can convert glucose to glucose 6 phosphate

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Hexokinase

Glucokinase

Phospho fructokinase

Both a & b

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

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%

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

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Histidine

Valine

Proline

Leucine

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

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linkage

crossing over

independent assortment

dominance

Insulin receptors are present in

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Cytoplasm of muscle cells

Cell membrane of liver cells

Cell membrane of muscles and liver cells

Cell membrane of all body cells

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