Recessive lethals are often mutations in essential genes.

Name: Recessive lethals are often mutations in essential genes.
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Recessive lethals are mutations in genes that are essential for normal development or survival. These mutations can only cause lethality when they occur in the homozygous state, as a single functional copy of the gene is usually sufficient for normal function. Examples of recessive lethals include mutations in genes involved in embryonic development or vital metabolic processes.

Recessive Lethals Are Often Mutations in Essential Genes