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melisa1
1 month ago
6

A firefighter wakes up in the middle of the night to the sound of an alarm. it is likely that her _____ have released epinephrin

e and norepinephrine. neural networks somatic and parasympathetic nervous systems adrenal glands reflex pathways
Biology
1 answer:
inysia [2.3K]1 month ago
3 0
When a firefighter is startled awake by an alarm at night, it is probable that her adrenal glands have released epinephrine and norepinephrine. The medulla within the adrenal glands produces epinephrine, commonly referred to as adrenaline. The secretion of epinephrine enters the bloodstream in response to intense fight or flight emotions, resulting in an increased heartbeat, stronger muscle contractions, and heightened physical activity.
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Un jardinero cruzó dos plantas de flores rosadas, con la esperanza de obtener plantas con flores del mismo color. Su sorpresa fu
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Este es un ejemplo de dominancia incompleta. Se trata de un fenómeno genético que se manifiesta cuando un gen dominante no logra expresar su totalidad en el alelo recesivo en un alelo heterocigoto dominante.

Por ende, ambos rasgos se muestran, dando lugar a una fusión de los dos alelos para los colores (blanco y rojo). El alelo rojo dominante muestra dominio parcial sobre el alelo blanco recesivo, produciendo así el alelo completamente rosado.

Según la ley mendeliana, las dos flores rojas son heterocigóticas. Por lo tanto, las flores rojas dominantes heterocigóticas deben ser R. El alelo blanco es recesivo (rr) y es enmascarado por el R rojo,

Sin embargo, al cruzar los dos alelos heterocigotos rojos:

Los fenotipos derivan en forma de

RR, (1) rojo Rr Rr (2) rosa rr (1) Blanco.

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