
Genes Letales
Authored by Genetica Lillo
Biology
University
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11 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Un gen letal es:
una combinación de alelos que disminuyen el "valor adaptativo".
una combinación de alelos cuya expresión en el genotipo conduce al desarrollo normal del individuo.
una combinación alélica cuya expresión en el genotipo bloquea o dificulta el desarrollo normal del individuo.
combinación de alelos que conduce a la muerte en una etapa temprana del desarrollo.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Los alelos deletéreos son:
los que conducen a la muerte en una etapa temprana del desarrollo.
los que causan una disminución del "valor adaptativo" del individuo portador.
los que conducen al desarrollo normal del individuo portador.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Elijan la secuencia de genes de mayor a menor penetrancia:
Subletal> Cuasinormal> Letal> Subvital
Subvital> Letal> Subletal> Cuasinormal
Cuasinormal> Subletal> Subvital> Letal
Letal> Subletal> Subvital> Cuasinormal
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
La ______ hace referencia a, la proporción de individuos que manifiestan el fenotipo esperado según su genotipo.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La proporción de genotípica al cruzar dos heterocigotas para un gen letal dominante con efecto letal recesivo es:
2:1
1:2:1
1:2
2:1:2
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Los genes __________ tienen una penetrancia entre el 50 y 90%
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En el ganado el alelo Dexter es dominante con efecto letal recesivo ¿Cómo será el genotipo del individuo que muere?
dd
Dd
DD
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