Question # 1

Sickle cell mutation affects

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One beta chain

Both beta chains

Only alpha chain

None of the alpha or beta chain

Pseudo-autosomal genes are present on

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X-chromosome

Y-chromosome

Both a & b

Autosomes

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

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Histidine

Valine

Proline

Leucine

How may gene pairs contribute to the wheat grain colour?

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one

two

three

four

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

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

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

The chances of which hemophilia is equal in males & females

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A

B

C

All

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

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linkage

crossing over

independent assortment

dominance

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

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25%

30%

50%

75%

When a single gene has multiple phenotypic effects, the phenomenon is called:

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condominance

epistasis

pleiotropy

sex-linkage

Genes can be mapped on chromosomes on the basis of

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Sex linkage

Assortment

Recombination frequency

Gene sequencing

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%

Bilirubin

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Turns skin Yellow

Damages brain cells

Causes jaundice

All of these

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

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dominance

incomplete dominance

over dominance

codominance

Genes for alpha and beta chains of hemoglobin are found on which chromosomes?

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Chromosome 16 alpha; chromosome 11 beta

Chromosome 11 alpha; chromosome 16 beta

Chromosome 11

Chromosome 16

Homogenetistic acid is oxidized rapidly when exposed to air, turning the urine

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White

Purple

Blue

Black

Which can convert glucose to glucose 6 phosphate

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Hexokinase

Glucokinase

Phospho fructokinase

Both a & b

A heterrozygote offspring quantitatively exceeds the phenotypic expression of both the homozygote parents due to:

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dominance

incomplete dominance

over dominance

codominance

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

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Histidine

Proline

Leucine

Valine

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