MEJOZA-CELIJSKA REDUKCIJA Flashcards

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1
Q

Sta je mejoza?

A

Redukcijska dioba kojom nastaju spolne celije .

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2
Q

Od cega se sastoji?

A

Mejoza 1 i 2.

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3
Q

Koliko faza ima mejoza 1?

A

Ima pet faza: profaza 1, prometafaza 1, metafaza 1, anafaza 1 i telofaza 1.

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4
Q

Profaza 1?

A

-najslozenija faza
-ima pet podfaza: leptoten, zigoten, pahiten, diploten i dijakineza
-znacajne promjene: sparivanje homolognih hromosoma
-krosingover=mjesanje gena izmedu nehomolognih hromosoma
-hijazma=mjesto gdje se desio krosingover, homologni hromosomi ostaju povezani

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5
Q

Prometafaza 1?

A

-bivalenti putuju ka ekvatoru celije

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6
Q

Metafaza 1?

A

-bivalenti povezani hijazmom i nalaze se u ekvatorijalnoj ravni
-diobeno vreteno vezano za hromosome

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7
Q

Anafaza 1?

A

-razdvajanje homolognih hromosoma

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8
Q

Telofaza 1?

A

-nastupa dolaskom hromosoma na suprotne strane celije

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9
Q

Koliko faza ima mejoza 2?

A

-pet: profaza 2, prometafaza 2, metafaza 2, anafaza 2, telofaza 2

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