A disease that is lethal only in the homozygous condition is most likely which of the following?

Question

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A disease that is lethal only in the homozygous condition is most likely due to an autosomal recessive gene. This is because in autosomal dominant inheritance, a single copy of the dominant allele would cause the disease, even in heterozygous individuals. X-linked inheritance would also be unlikely, as females would need two copies of the gene, which is unlikely due to the random X-inactivation process.

A Disease That Is Lethal Only in the Homozygous Condition