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La prueba cis-trans muestra una relación funcional entre mutaciones letales no alélicas en el complejo T/t
Cell
|July 1, 1983
Resumen
Las mutaciones letales recesivas en el complejo T/t de ratón muestran una complementación genética defectuosa. La prueba cis-trans reveló que estas mutaciones forman una unidad funcional, lo que sugiere un papel para la plasticidad del ADN en su relación genética.
Área de la Ciencia:
- Biología del desarrollo Biología del desarrollo.
- Genética La genética.
- Biología molecular La biología molecular.
Sus antecedentes:
- Las mutaciones letales recesivas en el complejo T/t de ratón muestran una complementación genética defectuosa característica.
- Este fenómeno ocurre incluso para mutaciones que afectan a diferentes etapas de desarrollo y que se sabe que no son alélicas.
Objetivo del estudio:
- Para investigar la relación genética o funcional entre las diferentes mutaciones letales del complejo T/t.
- Para determinar si la complementación defectuosa es una característica específica de estas mutaciones.
Principales métodos:
- Aplicación de la prueba cis-trans.
- Utilizando cromosomas t recombinantes bien definidos que llevan múltiples mutaciones letales o que carecen de letales específicos.
Principales resultados:
- Se observó específicamente una complementación defectuosa entre diferentes T/t letales en la configuración trans.
- Se demostró que los genes que mapean hasta 15 cM de distancia funcionan como una unidad.
Conclusiones:
- La complementación defectuosa en la configuración trans indica que los T/t-letal forman una unidad funcional.
- La plasticidad del ADN se propone como un mecanismo potencial para explicar este enigma genético.
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