Question

1. everyone in squidwards family has light blue skin, which is the dominant trait for body color in his hometown of squid valley. his family brags that they are a \purebred\ line. he recently married a nice girl who has light green skin, which is a recessive trait. create a punnett square to show the possibilities that would result if squidward and his new bride had children. use b to represent the dominant gene and b to represent the recessive gene.

a. list the possible genotypes and phenotypes for their children.
b. what are the chances of a child with light blue skin? ___ %
c. what are the chances of a child with light green skin? ___ %
d. would squidwards children still be considered purebreds? explain!

Explanation:

Step1: Determinar los genotipos de los padres

Como Squidward es de línea "purebred" y tiene la característica dominante (piel azul claro), su genotipo es \( BB \). La novia tiene piel verde claro (característica recesiva), por lo que su genotipo es \( bb \).

Step2: Crear el cuadro de Punnett

	\( B \)	\( B \)
\( b \)	\( Bb \)	\( Bb \)

Step3: Analizar genotipos y fenotipos (pregunta A)

• Genotipos posibles: \( Bb \)
• Fenotipos posibles: Piel azul claro (ya que \( B \) es dominante sobre \( b \))

Step4: Calcular probabilidades (preguntas B y C)

• Probabilidad de piel azul claro (\( Bb \)): \( \frac{4}{4} = 100\% \)
• Probabilidad de piel verde claro (\( bb \)): \( \frac{0}{4} = 0\% \)

Step5: Responder sobre "purebred" (pregunta D)

Un "purebred" tiene dos alelos iguales (homocigoto). Los hijos de Squidward tienen genotipo \( Bb \) (heterocigoto), por lo que no son "purebred".

Answer:

A. Genotipo: \( Bb \); Fenotipo: Piel azul claro
B. \( 100 \)
C. \( 0 \)
D. No. Los hijos son \( Bb \) (heterocigotos), no homocigotos.