Question # 1

An exchange of segments between non-sister chromatids of homologous chromosomes during meiosis is termed as :

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Crossing over

Hopping

Taking over

Segregation

All chromosomes other than sex chromosomes are called

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Linked Chromosomes

Autosomes

Autophagosommes

Dictyosomes

Which of the following hypothesis involved the evolution of eukaryotic cell from a prokaryotic cell

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Endosymbiont hypothesis

Membrane invagination hypothesis

Vent hypothesis

Both A and B

The prokaryotes may have arisen more than

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420 million years ago

42 billion years ago

3.5 billion years ago

1.5 billion years ago

Armadillos, the armoured mammals live only in :

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Asia

Europe

America

Africa

Population is a localized group of individuals belonging to :

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same species

different species

same community

same stand

Eukaryotes are thought to hve evolved firstly about:

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1.3 billion year ago

1.5 billion year ago

1.7 billion year ago

1.2 billion year ago

The dominance relations of a 4 O'clock plant can be described in terms of

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Complete dominance

Incomplete dominance

Partial dominance

Both B and C

Which of the following things were not collected by Darwin?

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Specimens of diverse faunas and floras of south America

South American fossils

13 types of finches

Turtles

What is the risk of a colour blind child in a family when mother is colour-blind but father is normal?

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100%

75%

50%

25%

Tritanopia is blindness of :

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Red Colour

Green Colour

Blue Colour

Pink Colour

Ultimate source of all changes is :

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Mutation

Genetic drift

Evolution

Migration

The processes that have transformed life on earth from its earliest forms to the vast diversity that we observe today, are collectively referred as

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Evolution

Succession

Revolution

All of above

The concept that all living things came into existence in their present forms especially created by Nature is called as

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Theory of special creation

Theory of special selection

Theory of natural creation

Theory of natural selection

Darwin collected 13 types of birds of :

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Robins

Sparrows

Kingfishers

Finches

The change in frequency of alleles at a locus that occurs by chance is called :

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genetic drift

genetic change

gene mutation

gene frequency

Endosymbiont hypothesis was first proposed by

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Lynn Margulis

Malthus

Cuvier

Darwin

Allele for whiteness in Drosophila is :

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Recessive

Codominant

Dominant

Partially Dominant

The idea of endosymbiont hypothesis was first proposed by:

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Lynn marguils

Wallace

Karlene Schwartz

Lamarck

Rh factor or antigen was first studied in :

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Man

Owl

Monkey

Fish

Normal fruit flies have

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White eyes

Bright red eyes

Light red eyes

Black eyes

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