QUESTION IMAGE
Question
in humans, a cleft chin is dominant and no - cleft is recessive. what will the generations look like? assume that mendels method of crossing two true breeding parents with opposite traits is followed. check all that apply.
the p generation, f₁ generation, and f₂ generation will have all cleft chins.
the p generation, f₁ generation, and f₂ generation will have all no - cleft chins.
the p generation and f₁ generation will have all cleft chins.
the f₁ generation will have all cleft chins.
the p generation and f₂ generation will have all no - cleft chins.
the p generation and f₂ generation will have cleft chins and no - cleft chins.
the p generation, f₁ generation, and f₂ generation will have cleft chins and no - cleft chins.
Step 1: Definir los alelos
Sea \(C\) el alelo para el mentón hendido (dominante) y \(c\) el alelo para el mentón sin hendir (recesivo). Los padres de la generación \(P\) son de raza pura. Entonces, uno es \(CC\) (mentón hendido) y el otro es \(cc\) (mentón sin hendir).
Step 2: Cruzar la generación \(P\)
Al cruzar \(CC\times cc\), todos los descendientes de la generación \(F_{1}\) tendrán el genotipo \(Cc\). Debido a que \(C\) es dominante, todos en \(F_{1}\) tendrán mentón hendido.
Step 3: Cruzar la generación \(F_{1}\)
Al cruzar \(Cc\times Cc\) (generación \(F_{1}\) entre sí), usando la tabla de Punnett:
| \(C\) | \(c\) | |
|---|---|---|
| \(c\) | \(Cc\) | \(cc\) |
La generación \(F_{2}\) tendrá genotipos \(CC:Cc:cc = 1:2:1\). Esto significa que \(CC\) y \(Cc\) (mentón hendido) y \(cc\) (mentón sin hendir) estarán presentes. La generación \(P\) tenía \(CC\) y \(cc\) (mentón hendido y sin hendir respectivamente).
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- The \(F_{1}\) generation will have all cleft chins.
- The \(P\) generation and \(F_{2}\) generation will have cleft chins and no - cleft chins.