Question

which statement is always true when describing sex - linked inheritance? it results in a dominant trait. the alleles are found on the x or y chromosome. the resulting trait is influenced by multiple alleles. it is affected by alleles on at least three different chromosomes.

Explanation:

Sex - linked inheritance specifically refers to alleles located on the sex chromosomes (X or Y). A dominant trait is not always the case in sex - linked inheritance (e.g., color - blindness is a recessive sex - linked trait). Multiple alleles influencing a trait is more related to other inheritance patterns like some blood - type inheritance (not specific to sex - linked). And sex - linked inheritance is about alleles on sex chromosomes (not at least three different chromosomes).

Answer:

The alleles are found on the X or Y chromosome.