Milder forms of osteogenesis imperfecta (types I and IV) are inherited in which pattern?

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Multiple Choice

Milder forms of osteogenesis imperfecta (types I and IV) are inherited in which pattern?

Explanation:
Milder forms of osteogenesis imperfecta are autosomal dominant because they usually arise from mutations in the COL1A1 or COL1A2 genes, which affect one allele. A single mutated copy can produce the disorder, giving a 50% chance of passing it to offspring, with variable expression resulting in the milder phenotypes seen in types I and IV. Autosomal recessive would require two abnormal copies and often presents differently or more severely; X-linked recessive and mitochondrial patterns do not match the common inheritance of these collagen-gene mutations.

Milder forms of osteogenesis imperfecta are autosomal dominant because they usually arise from mutations in the COL1A1 or COL1A2 genes, which affect one allele. A single mutated copy can produce the disorder, giving a 50% chance of passing it to offspring, with variable expression resulting in the milder phenotypes seen in types I and IV. Autosomal recessive would require two abnormal copies and often presents differently or more severely; X-linked recessive and mitochondrial patterns do not match the common inheritance of these collagen-gene mutations.

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