Question # 1

The process of mitaosis ensures that:

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Each new cell is genetically different form its parent

Each new cell receives the proper number of chromosomes

Cells which divide at the appropriate tme

Chromosomes replicate without errors

Down's syndrome is case of .................. .

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Autosomy

Monosomy

Trisomy

Tetrasomy

In turner's syndrome female have ................. chromosomes .

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46

45

47

22

Plants lack ................... .

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Protein

Centrioles

Spindle fibers

Cytokisnesis

Chromosomes condensation occurs during .............. .

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G1-phase

G2-phase

S-phase

Interphase

The phase which can exist for life is:

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G₀

G₁

G₂

S phase

Chromosomes are not visible during:

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Anaphase

Prophase

Interphase

Metaphase

Chromatids get separated form each other during:

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Prophase

Telophase

Anaphase

Metaphase

In which stage of the cell cycle, the cell is preparing enzymes for chromosome duplication.

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G1

G2

S

M

The exchange of parts of non-sister chromatids is called:

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Chiasmata

Linkage

Crossing over

None of these

In which stage of the cell cycle most cells spend their lives?

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Prophase

Metaphase

Interphase

Telohase

Which one is the lowest taxon of classification?

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Genus

Order

Species

Phylum

Which of the following structure is absent in animals?

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Spindle

Centrioles

Chromatids

Phragmoplant

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