Question # 1

Phenomenon of crossing over in fruit fly was observed by:

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T.H. Morgan

W.Flemming

Oscar Hertwig

Louis pasteur

Which of the following is unique to mitosis and not a part of meiosis?

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Homologous chromosomes pair forming bivalents

Homologous chromosomes cross over

Chromosomes pairs are broken during anaphase

Chromatids separate during anaphase

the division of cytoplasm is called ............. .

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Karyokinesis

Cytokinesis

Anaohase

Telophase

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

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Autosomy

Monosomy

Trisomy

Tetrasomy

Karyokinesis is division..................... .

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Nucleus

Cytoplasm

DNA

proteins

Which event distinguishes meiosis form mitosis?

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Condensation of chromosomes

Loss of the nuclear membrane

Formation of metaphase plate

Pairing of homologous chromosomes

Necrosis is death due to ............ cell damage.

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Unexpected

Accidental

Both a & b

None

Two consecutive cell division occurs in ..............

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Meiosis

Mitosis

Interphase

None

Cytokineses in a plant cell is characterized by:

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The equal division of homologous chromosomes

A pinching off a cell membrane to divide the cell

The formation of a cell plate in the cytoplasm

The movement of the chromosomes from the metaphase plate

Presence of third copy of homoglus chromosomes in the cell is called ........... .

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Monosomy

Disomy

Trisomy

Tetra somy

Necrosis is:

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Division of cells

Suicide of cells

Cell death by tissue damage

Weakness of cells

Example of Apoptotic process is ............... .

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Disappearance of tadpole tail

Disappearance of web human hand

Formation of fingers of hand

All of the above

Males with two Y chromosomes have more .................. tendensies.

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Citizenship

Criminal

Good

None

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