Question

how are the alleles for sex - linked traits inherited? they are passed from the y chromosome in parents to the x chromosome in offspring. they are passed from the x chromosome in parents to the xy chromosome in offspring. they are passed from parents to offspring on the x and y chromosomes. they are passed from any chromosome in the parents to the x or y chromosome in the offspring.

Explanation:

Sex - linked traits are determined by genes located on the sex chromosomes (X and Y). Inheritance of sex - linked alleles occurs through the transfer of these sex chromosomes from parents to offspring. The X and Y chromosomes carry specific alleles for sex - linked traits, and these are passed on during reproduction.

Answer:

They are passed from parents to offspring on the X and Y chromosomes.