What are those structures that appear as “beads on string” in the chromosomes when viewed under electron microscope

1.  Genes

2.  Nucleotides

3.  Nucleosomes

4.  Base pairs.

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4
Correct Answer :

Nucleosomes


Explanation :
No Explanation available for this question

Which one is not a trait of xerophytes

1.  Thick cuticle

2.  Sunken stomata

3.  Aerenchyma

4.  well-developed  mechanical tissue

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4
Correct Answer :

Aerenchyma


Explanation :
No Explanation available for this question

Mutations can be induced with:

1.  Infra Red radiations B

2.  IAA

3.  Ethylene

4.  Gamma radiations

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4
Correct Answer :

Gamma radiations


Explanation :
No Explanation available for this question

The behaviour of the chromosomes was parallel to the behavior of genes during meiosis was noted by

1.  Correns

2.  Tschermark

3.  Sutton and Boveri

4.  de Vries

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4
Correct Answer :

Sutton and Boveri


Explanation :
No Explanation available for this question

Which of the following statements is not true of two genes that show 50% recombination frequency

1.  The genes are tightly linked

2.  The genes show independent assortement

3.  If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosis

4.  The genes may be on different chromosomes

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4
Correct Answer :

The genes are tightly linked


Explanation :
No Explanation available for this question

If both parents are carrier for thalessemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child

1.  50%

2.  25%

3.  100%

4.  No chance

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4
Correct Answer :

25\%


Explanation :
No Explanation available for this question

Taste buds of the posterior side of tongue in human can detect:

1.  Sour taste

2.  Bitter taste

3.  Sweet taste

4.  Saltish taste

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4
Correct Answer :

Bitter taste


Explanation :
No Explanation available for this question

Anterior irregular wavy part of retina is:

1.  Ora serrata

2.  Pars optica

3.  Ocular conjunctiva

4.  Fovea centralis

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4
Correct Answer :

Ora serrata


Explanation :
No Explanation available for this question

Structure that provides balance to the body is located in:

1.  Outer ear

2.  Middle ear

3.  inner ear

4.  Eustachian tubes

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4
Correct Answer :

inner ear


Explanation :
No Explanation available for this question

When we migrate from dark to light, we fail to see for some time, but after a time visibility becomes normal. It is example of:

1.  Accommodation

2.  Adaptation

3.  Mutation

4.  Photoperiodism

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4
Correct Answer :

Adaptation


Explanation :
No Explanation available for this question
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