Duplicaciones segmentales Flashcards

1
Q

Mutación que produce 1 o más copia de seg de DNA

A

Dup segmentales

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2
Q

Dup de gen en tandem (porqué)

A

Por entrecruzamiento de cromatidas alineadas incorrectamente
- En cro hermanas: unequal sister cromatid exchange
- En mismo cr: unequal crossover

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3
Q

Tandem repeats son…

A

Sec de 2 o más pb de DNA que se repiten varias veces en cadena en un cr
- En DNA no codificante
- Marcadores geneticos para rastrear herencia

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4
Q

Dup seg / low copy repeats (SDs) pares de bases

A

10 - 300 pb

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5
Q

Dup seg / low copy repeats (SDs) % del G

A

6.6 G

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6
Q

Cuales cr. tienen mayor cantidad de low copy repeats / dup seg

A

22 y Y

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7
Q

Los sustratos de NAHR (recom de alelos no homo) son

A

Dup seg / low copy repeats

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8
Q

Tipos de dup seg / low copy repeats

A

Dup por transposición
Dup por fisión ancestral
Dup subgenómica a gran escala

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9
Q

Transposisión dup

A

Cuando DNA se integra a otra localización (retrotransp)

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10
Q

Dup por fisión ancestral

A

Una c. se comió a otra y parte del genoma se unio

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11
Q

Dup subgenómica a gran escala

A

Por tranlocación de cr.
- Regiones inestables: pericentromericas y subtelomericas (eucromatina)
Propensas a recombinación con otras cr.

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12
Q

Ej. low copy repeat Hemophilia s. tipo A

A

Inversión que provoca interrupción de factor coagulasa VII por 2 SDs

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13
Q

Ej. low copy repeat Lupus eritematoso

A

(4.5mb) inversión muy grande 8p23

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14
Q

Tipos de duplicaciones segmentales / low copy reats (SDs) locationwise

A

Pericentromericos
Subtelomericos
Intersticiales

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15
Q

SDs Pericentromericos

A

Generados por dup intercromosomicas

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16
Q

SDs Subtelomericos

A

Formados por mult. eventos de rompimiento de doble cadena y reparaciones de región

17
Q

SDs intersticiales

A

Generado por dup intracromosomicas
(son los mas grandes)