GAMETOGENESIS Flashcards

1
Q

El desarrollo inicia en la…

A

fecundacion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Los gametos forman el…

A

cigoto

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Las CGP se originan en…

A

el epiblasto (segunda semana)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Las CGP se desplazan a… y migran a…

A

a) estria primitiva por gastrulacion
b) saco vitelino

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

En la cuarta semana las CGP…

A

De la pared del saco vitelino a las gonadas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

En la quinta semana las CGP…

A

CGP invaden las gonadas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Antes de la fecundacion, las CGP pasan por… para…

A

“Meiosis”
-reducir el numero de cromosomas
-citodiferenciacion (completar la maduracion)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

El ser humano posee…

A

23 mil genes, 46 cromosomas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Los cromosomas se heredan juntos…

A

genes ligados

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Las celulas somaticas poseen…

A

23 pares homologos de cromosomas (diploide)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

De estos 23 pares…

A

-22 pares: autosomicos
-1 par: sexual

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Los gametos son…

A

Haploides

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Antes de la mitosis existe la interfase…

A

G1: sisntesis de proteinas
S: replicacion de ADN, duplicacion de cromosomas (cromatidas hermanas)
G2: reparacion del ADN, preparar para la mitosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Mitosis
-Profase

A

los cromosomas se condensan

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

-Prometafase

A

se forma el huso que une al centromero con los centriolos

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

-Metafase

A

Cromatidas se duplican, se forma la linea ecuatorial

17
Q

-Anafase

A

Cromatidas se dividen, las cromatidas se dirigen a los polos opuestos gracias al huso

18
Q

-Telofase

A

Citocinesis, se forman membranas, envolturas…

19
Q

Ovogenesis es el proceso…

A

Por el que las ovogonias se convierten en ovocitos primarios