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BigorU [14]
2 years ago
6

What is a centromere

Biology
2 answers:
Inessa [10]2 years ago
7 0

a structure on DNA which helps in joining of sister chromatids.

gtnhenbr [62]2 years ago
3 0

the region of a chromosome to which the microtubules of the spindle attach, via the kinetochore, during cell division.

Brainliest Please :)

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Can somebody give me the answer for these...
labwork [276]

Answer:

1. Life cycle of a cell starts from

G1 phase - S phase (synthesise phase) - G2 phase - mitosis.

2. By mitosis bcoz it restore nucleo cytoplasmic ratio means ploidy of cell remain same.

3. Bcoz of transformation of normal cells into cancerous cells by Carcinogens present in tobacco.,drugs .etc

4 mitosis occurs in plants animals

Binary fission occurs in bacteria and other single celled organism.

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Both give rise to two daughter cells.

5.sex cells (n) are produced by meiosis from gamete mother cells(2n).

6.in meiosis <em>ploidy</em><em> </em><em>of</em><em> </em><em>cell</em><em> </em><em>become</em><em> </em><em>half</em><em> </em>

<em>Means</em><em> </em><em>diploid</em><em> </em><em>cell</em><em> </em><em>form</em><em> </em><em>haploid</em><em> </em><em>cells</em>

<em>And</em><em> </em><em>4</em><em> </em><em> </em><em>haploid</em><em> </em><em>daughters</em><em> </em><em>cells</em><em> </em><em>are</em><em> </em><em>formed</em><em>.</em><em> </em>

<em>In</em><em> </em><em>mitosis</em><em>,</em><em> </em><em>ploidy</em><em> </em><em>of</em><em> </em><em>cell</em><em> </em><em>remain</em><em> </em><em>same</em><em> </em>

<em>Means</em><em> </em><em>haploid</em><em> </em><em>form</em><em> </em><em>haploid</em><em> </em><em>and</em><em> </em><em>diploid</em><em> </em><em>form</em><em> </em><em>diploid</em><em>.</em><em> </em>

<em>1</em><em> </em><em>cell</em><em> </em><em>form</em><em> </em><em>2</em><em> </em><em>daughter</em><em> </em><em>cells</em><em>.</em><em> </em>

<em>Hope</em><em> </em><em>this helps</em><em> </em><em>you</em><em>.</em><em>.</em><em> </em><em>Frnd</em><em> </em><em>❤️</em>

4 0
3 years ago
What category of organic macromolecules does dna fit into?.
Basile [38]

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Nucleic Acid

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DNA and RNA are example of Nucleic acids

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You didn't give the following

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