Question

which statement about sex - linked traits is true?
sex - linked traits are always dominant.
sex - linked traits only occur in heterozygous allele pairs.
sex - linked traits may be passed from parent to offspring on either the x chromosome or the y chromosome.

Explanation:

• Sex - linked traits are not always dominant. There are recessive sex - linked traits as well (e.g., hemophilia).
• Sex - linked traits can occur in homozygous or heterozygous states (for females with two X chromosomes).
• Sex - linked traits are genes located on sex chromosomes (either X or Y). So, they can be passed from parent to offspring on either the X or Y chromosome.

Answer:

Sex - linked traits may be passed from parent to offspring on either the X chromosome or the Y chromosome.