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Genes that are carried by either sex chromosome are said to be sex linked. Men normally have an X and a Y combination of sex chromosomes, while women have two X's. Since only men inherit Y chromosomes, they are the only ones to inherit Y-linked traits.

Answer:

Alleles are passed from parents' sex chromosomes to the sex chromosomes of offspring.

Explanation:

Sex-linked traits are the one genes for which are present on the sex chromosomes. Since genes for these traits are present on the sex chromosomes, the sex chromosomes of the parents would transmit these genes to the sex chromosomes of progeny.

Example: The gene for colorblindness is passed from the X chromosome of the father to the X chromosome of the daughter. The X chromosome is one of the sex chromosomes in human.  

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