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Q.
Inheritance of which of the following traits is shown in the given cross ?
Principles of Inheritance and Variation
Solution:
In the given cross, passing of disease is from carrier female to male progeny (criss-cross inheritance). Any trait that shows criss-cross inheritance is located on the sex chromosome.
Presence of a single recessive gene i.e. $X^c$ in carrier individuals $(XXC)$ does not cause the disease, thus the trait is recessive.
