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

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

The kingdom of bacteria is:

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Fungi

Monera

Protista

Plantae

The phases of cell cycle are:

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Interphase

Division phase

Both a and b

None

The fund event of interphase occurs with .............. .

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Replication of DNA

Replication of centriol

Movement of centriol

Both a & b

What reason would you suggest for the fact that the total DNA content of each daughter cell is reduced during meiosis?

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Chromosomes do not replicate during the interphase before meiosis 1

Chromosomes do not duplicate between meiosis 1 and 2

Half of the chromosomes form each gamete are broken

Sister chromatids separate during anaphase of meiosis 1

Programmed cell death is called ............... .

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Apoptosis

Necrosis

Both a & b

None

Type of spindle fibre which attaches the chromosomes is called:

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Kinetochore

Non Kinetochore

Bot a and b

Centromere

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

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Protein

Centrioles

Spindle fibers

Cytokisnesis

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

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G1

G2

S

M

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

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GI

S

M

G2

The cell death due to tissue damage is:

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Apoptosis

Necrosis

Metastasis

Synapsis

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