seldeling:mitose Flashcards

1
Q

gee 3 redes waarom mitose biologies belangrik is.

A

groei, herstel van verslete weefsels, ongeslagtelike voortplanting

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2
Q

onderskei tussen somatiese selle en geslagselle.

A

somatiese selle: liggaamselle
geslagselle/gamete: -eier- of spermselle

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3
Q

noem 2 hooffases waaruit die selsiklus bestaan.

A

interfase en mitose(kariokinese en sitokinese)

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4
Q

dui die chromosoongetal van n dogtersel, wat uit bostaande kerndeling gevorm sal word, aan.

A

6

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5
Q

hoeveel chromosome word in die menslike liggaam aangetref?

A

46 (23 paar)

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6
Q

uit watter twee chemiese verbindings word n chromosoon opgebou?

A

NA en proteinee(histone)

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6
Q

waarom is die chromosoongetal in alle organismes altyd n ewe getal?

A

chromosone kom in pare voor.

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7
Q

wat word die afsonderlike 2 stringe van elke chromosoon genoem?

A

chromatiede

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8
Q

wat is die naam van die struktuur wat chromatiede verbind?

A

sentromeer

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8
Q

noem die segment op n chromosoon , wat n erflike eienskap beheer.

A

geen

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9
Q

noem die proses tydens interfase, waartydens DNA n identiese kopie van homself maak.

A

replisering

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10
Q

definieer die term kanker

A

dit is n siekte waar liggaamselle onbeheersd begin verdeel- gewasse vorm wat kwaadaardig kan wees en omringede weefsels binnedring en vernietig.

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11
Q

gee die term vir die verspreiding van kanker na ander dele van die liggaam deur bloed.

A

metastase

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12
Q

noem 4 voorbeelde van karsinogene.

A

sigaretrook, bestraling, son, erflike faktore

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13
Q

definieer histologiese ondersoek

A

die ondersoek van weefselmmonsters onder n mikroskoop

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14
Q

definieer patoloog.

A

.n spesialis wat weefselmonsters vir diagnostiese of forensiese doeleindes ondersoek

15
Q

definieer biopsie.

A

die verwyydering van weefsels of selle o ondersoek te word, om die voorkomms of oorsaak van n siekte te bepaal.

16
Q

noem 3 maniere hoe kanker behandel kan word.

A

chirugie, bestraling, chemoterapie.

17
Q

definieer selsiklus

A

die tydperk waartydens n sel groei, genetiese materiaal repliseer en verdeel.

18
Q
A