Meiosis PRESENTACIONES Flashcards

1
Q

cuales son los grupos de cromosomas

A

A-G
A 1-3 largos
G 21-22 los mas cortos

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2
Q

diploide

A

46 cromosomas

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3
Q

haploide

A

23 pares

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4
Q

características meiosis

A

en gonadas
recombination genetica
division cells germinales o gametos

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5
Q

cells precursors de gametos

A

ovogonias y espermatogonias

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6
Q

meiosis 1

A

recombination genetica
de 43 a 23 por célula
SIN FASE S

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7
Q

meiosis 2

A

division longitudinal

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8
Q

que es la division longitudinal de la meiosis 2

A

de 23 cromosomas de 2 cromáticas a 23 cromosomas de 1 sola cromatida x celula

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9
Q

pasos meiosis 1

A

profa meta anafa telofa

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10
Q

profase

A

lepto- condensation croosomas
cigo- apareamiento homólogos
paqui- recombination, bivalentes o tetradas
diplo- separación bivalentes (receso meiotico en femenina)
diacinesis- máxima condensación de cromosomas

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11
Q

meioses es un ciclo?

A

NO

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12
Q

que pasa con los cromosomas homólogos en la masculina y femenina

A

femenina- se quedan unidos y entran en receso meiotico
masculina- se separan

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13
Q

meiosis 1 explica pasos

A

profa- recombinacion
meta- alienation cromosomas
ana- migration 2 cromatidas
telo- separacion de homologos

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14
Q

que queda al terminar meiosis 1

A

2 celulas, 23 cromosomas de 2 cromátidas RECOMBINADO

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15
Q

meiosis 2 pasos

A

Telo1- meta 2
meta 2- alienation de cromosomas
ana 2- división cromatidas recombinadas
telo 2- separacion

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16
Q

que da como resultado la meiosis 2

A

4 cells 23 pares 1 cromatida