Question

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e. a woman that is heterozygous for tongue rolling is crossed with a man that is also heterozygous for tongue rolling. (note: tongue rolling is dominant to non - tongue rolling.) complete the punnett square and answer the following questions. 1. how many possible genotypes are there among the offspring? ___ 2. how many possible phenotypes are there among the offspring? _ 3. what percentage of the offspring will be tongue rollers?___ 4. what percentage of the offspring will not be tongue rollers? __ 5. what is the phenotypic ratio of their offspring?___ 6. what is the genotypic ratio of their offspring?_______

Explanation:

Step1: Identificar los genotipos

Los genotipos posibles son \( TT \), \( Tt \) y \( tt \).

Step2: Identificar los fenotipos

El fenotipo \( TT \) y \( Tt \) es "rollizo" (dominante), \( tt \) es "no rollizo".

Step3: Calcular el porcentaje de rollizos

Hay 3 casos de rollizos (\( TT \), \( Tt \), \( Tt \)) de 4, \( \frac{3}{4}=0.75 = 75\% \).

Step4: Calcular el porcentaje de no rollizos

Hay 1 caso de no rollizo (\( tt \)) de 4, \( \frac{1}{4}=0.25 = 25\% \).

Step5: Calcular la razón fenotípica

Rollizos : No rollizos = \( 3:1 \).

Step6: Calcular la razón genotípica

\( TT:Tt:tt = 1:2:1 \).

Answer:

1. 3
2. 2
3. 75%
4. 25%
5. 3:1
6. 1:2:1