Cromatina Sexual Flashcards

1
Q

Científicos que demostraron que es posible determinar genéticamente el sexo de un individuo en 1949.

A

Murray Barr y Ewart Bertram

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2
Q

Masa minúscula de cromatina que observamos en células en interfase y, que cinco tramos únicamente en las hembras de los mamíferos.

A

Corpúsculo de Barr o cromatina sexual X

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3
Q

Características de la cromatina sexual X según la hipótesis de Lyon

A
  1. La cromatina sexual X es genéticamente inactiva.
  2. Puede ser en el cromosoma X paterno o materno.
    3- Ocurren en el día 16 del periodo embrionario.
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4
Q

Gen determinante contenido en el cromosoma Y; el cual hace que se formen los testículos del embrión

A

El gen SRY

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5
Q

Que le pasará al embrión su hay una mutación en el gen SRY

A

El embrión desarrollará genitales femeninos a pesar de tener cromosomas XY.

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6
Q

Cromatina sexual de 46,XX

A

+

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7
Q

Cromatina sexual de 46,XY

A

-

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8
Q

Cromatina sexual 47,XXY

A

+

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9
Q

Cromatina sexual 47,XYY

A

-

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10
Q

Cromatina sexual 47,XXX

A

+, 2 corpúsculos

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11
Q

Cromatina sexual 49, XXXXY

A

+, 3 corpúsculos

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12
Q

49,XXXXX

A

+, 4 corpúsculos

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