Question

1. everyone in squidward’s 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.
g: ____________ p: ____________
b. what are the chances of a child with light blue skin?
____ out of __ or ____ %
c. what are the chances of a child with light green skin?
____ out of __ or ____ %

Explanation:

Step1: Determine parental genotypes

Since Squidward's family is "purebred" with the dominant light - blue skin trait, his genotype is BB. His wife has the recessive light - green skin trait, so her genotype is bb.

Step2: Create Punnett square

The possible gametes from Squidward are all B, and the possible gametes from his wife are all b. The Punnett square will have B along one side and b along the other side. The resulting genotypes in the square are all Bb.

Step3: Analyze genotypes and phenotypes

• Genotype: All offspring will have the genotype Bb.
• Phenotype: Since B is dominant, all offspring will have the light - blue skin phenotype.

Step4: Calculate probabilities

Since all offspring have the genotype Bb (light - blue skin phenotype), the probability of a child with light - blue skin is 4 out of 4 or 100%, and the probability of a child with light - green skin is 0 out of 4 or 0%.

Answer:

A. Genotype: Bb; Phenotype: Light - blue skin
B. 4 out of 4 or 100%
C. 0 out of 4 or 0%