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Polytene chromosome becomes giant due to...

Polytene chromosome becomes giant due to

A

polyploidy

B

cancer

C

nondisjunction

D

endoreduplication

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The correct Answer is:
D
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Y-chromosome is

X-chromosome is

At which stage of cell division a chromosome becomes associated with two chromatids and at which stage they get separated ?

Choose the correctly matched pairs and correct option (a) Leptotene - chromosomes become invisible (b) Zygotene - pairing of homologous chromosomes (c) Pachytene - Dissolution of synaptonemal complex takes place (d) Diplotene - Bivalent chromosomes appear as tetrads (e) Diakinesis - Terminalisation of chiasmata takes place

XY-chromosomes are

What are chromosome?

Point at which polytene chromosome appear to be attached is

In prophase, chromosomes shorten and thicken due to

DNA replication takes place in Or DNA molecule of each chromosome become double in Or DNA and histone proteins are synthesized during the following phase of cell cycle.

What is chromosome?

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