Attached earlobes: Alice's earlobes are attached directly to the side of her

Question

Attached earlobes: Alice's earlobes are attached directly to the side of her head, but her sister, freida, has earlobes which hang free below the attachment point. Alice's husband, Allen, also has attached earlobes, as does every one in his family. Their eight children all have attached earlobes. Freida's husband, Fred, has free hanging earlobes. Fred's mother has free hanging earlobes, but his father has attached earlobes. of the eight children of Frieda and Fred, six have free hanging earlobes and two have attached earlobes. What is the most probable method of inheritance of attached earlobes?

Explanation / Answer

autosomal recessive mode of inheritance

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