Question

The pedigree traces red-green color blindness. Which family members have red-green color blindness? Sam, Tim, Bella, and Joshua Lisa and Monica Ben, Jenny, Mike, Carol, Katie, and Chris Sam, Joshua, and Tim

Answer 1

Red-green color blindness is an X-linked recessive trait, where mothers pass the recessive allele for the trait to their sons. Family members who could have red-green color blindness are Sam, Tim, Bella, and Joshua.

Step-by-step explanation:

Red-green color blindness is an X-linked recessive trait, where mothers pass the recessive allele for the trait to their sons. Therefore, the family members who could have red-green color blindness are Sam, Tim, Bella, and Joshua.

Answer 2

Answer: A. Sam, Tim, Bella, and Joshua

Step-by-step explanation:

In pedigrees, whether or not an individual expresses a certain trait is indicated by whether the shape is filled in completely by a color- in this case, orange.

On the other hand, if half of the shape is colored by orange, the person is a carrier of the allele.

If a family member does not carry or have the trait, then their shape is empty.

For this question, we are looking to determine which family members have red-green color blindness, meaning that they express, or show the trait.

Which people have their shapes completely filled in by the color orange?

Sam, Tim, Bella, and Joshua have shapes completely filled in. Therefore, they have red-green color blindness.

The graphic for this question is attached below. Let me know if you are experiencing any issues or have any questions.