Question

a genetic disease is found in a family that affects the immune system, lungs, heart, and kidneys. a dna analysis of several affected and unaffected family members determines that the disease is caused by a mutation in a single gene. what type of inheritance pattern is shown in this disease? (1 point)codominancepleiotropypolygenic traitincomplete dominance

Explanation:

• Codominance: Both alleles are expressed simultaneously. For example, in blood types, AB blood type shows codominance of A and B alleles. But this is not relevant here as the question is about a single gene affecting multiple traits.
• Pleiotropy: A single gene has multiple phenotypic effects. Here, a mutation in a single gene affects the immune system, lungs, heart, and kidneys - multiple traits.
• Polygenic trait: Traits controlled by multiple genes. But the question states it's caused by a mutation in a single gene.
• Incomplete dominance: One allele is not completely dominant over the other. For example, in snapdragons, pink flowers (a blend of red and white) show incomplete dominance. Not relevant to the given situation.

Answer:

pleiotropy