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Question:

Represented is the inheritance pattern of a certain type of traits in humans. Which one of the following conditions could be an example of this pattern?

Sickle cell anaemia

Thalassemia

Phenylketonuria

Haemophilia

Solution:

This is a criss-cross inheritance. This is the inheritance of sex-linked characters transmitted from fathers to daughters or from mothers to sons. It is present in sex-linked characters, e.g., haemophilia.