Question # 1

................ occurs in somatic cells.

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Meiosis I

Meiosis II

Mitosis

None

Independent assortment occurs during .................... .

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Meiosis I

Meiosis II

Mitosis

None

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

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Prophase

Metaphase

Interphase

Telohase

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

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Autosomy

Monosomy

Trisomy

Tetrasomy

Cytokinesis in a plant cell is characterized by:

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The equal division of homologous chromosomes

A pinching off of the cell membrane to divide the cell

The formation of a cell plate in the cytoplasm

The movement of the chromosomes from the metaphase plate

Nuclei of human cell contain ............ autosomes.

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23 pairs

22 pairs

12 pairs

14 pairs

The class of man is:

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Insecta

Mammalia

Magnoliopsida

Proteobacteria

Which of the following structure is absent in animals?

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Spindle

Centrioles

Chromatids

Phragmoplant

In which stage of the cell cycle each chromosomes is duplicated and so it consists of two chromatids?

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G I

S

M

G2

In this phase of Interphase the cell prepares proteins for the production of spindle fibres.

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G2 phase

G O phase

S phase

G I Phase

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

Chiasmata is formed during:

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Prophase I

Anaphase I

Prophase II

Anaphase II

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