Question # 1

Nerve cells and eye lens cells remain in stage for life time.

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G0

G1

S

G2

The basic difference betweenn spermatogenesis and oogenesis is that :

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During spermatogenesis two more polar bodies are produced

The mature ovum is haploid while the sperm is 1n

Spermatogenesis involves mitosis and meiosis, but oogenesis involves meiosis only

In oogenesis, one mature ovum is produced, and in spermatogenesis four mature sperm are produced

The tumor which is localized and not transferred to other body parts.

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Malignant

Benign

apoptosis

Necrosis

Each bivalent consists of four.

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Chromosomes

Chromatids

spores

Chiasmata

Which pair of chromosome fails to segregate in down's syndrome.

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7th

15th

19th

21st

The actual reduction division is.

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Meiosis -I

Mitosis

Cytokinesis

Meiosis -II

Pairing of homologous chromosomes for tetrad formation starts at.

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Leptotene

Zygotene

Diplotene

Pachytene

The chromatids repel each other during.

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Leptotene

Zygotene

diplotene

Pachytene

Contractile ring in cytokinesis is formed by

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Tubulin

Actin and Myosin

Keratin

Cyclin

The uterine layer which is shed with each monthly cycle is:

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Endometrium

Perimetrium

Tunica albuginea

Myometrium

Meiosis II is just like the

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Amitosis

Mitosis

Replacement

Regenerations

The interphase of meiosis lacks the stage.

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G0

G1

G2

S

The tumours which are of small size and localized are

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Bengin

Malignant

Gentle

Nasty

The human egg is swept through the oviduct toward the uterus by:

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The beating of the egg's cilia

Rhythmic contraction of the uterus

Rhythmic contraction of the oviduct

The beating of the cilia in the oviduct

RNA and Protein called.

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Insulin

Tubulin

Actin

Myosin

Chromatin network is visible during

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Interphase

Prophase

Anaphase

Metaphase

Shape of the plant cell does not change greatly compared with an animal cell because it is surrounded by a rigid

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Cell membrane

Capsule

Sheath

Cell wall

First essential phenomenon of meiosis i.e pairing of homologous Chromosomes called synapsis starts in

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Leptotene

Zygotene

Pachytene

Diplotene

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