4x Non-Mendelian inheritance patterns can be sorted into three categories: incomplete dominance codominance, and sex-linked traits Which is a example of a sex-linked trait? A Down's syndrome B Color blindness C Human blood type D Tail length in dogs

## Step 1<br />The problem is asking us to identify which of the given options is an example of a sex-linked trait. Sex-linked traits are those that are determined by genes located on the sex chromosomes. In humans, these are the X and Y chromosomes. <br /><br />## Step 2<br />Let's analyze each option:<br /><br />### A. Down's syndrome<br />This is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. It is not a sex-linked trait because it is not determined by genes on the sex chromosomes.<br /><br />### B. Color blindness<br />This is a condition that affects the ability to distinguish certain colors. It is a well-known example of a sex-linked trait because the genes responsible for color blindness are located on the X chromosome.<br /><br />### C. Human blood type<br />The blood type is determined by the ABO gene, which is not located on the sex chromosomes. Therefore, it is not a sex-linked trait.<br /><br />### D. Tail length in dogs<br />This trait is determined by genes that are not located on the sex chromosomes, so it is not a sex-linked trait.<br /><br />## Step 3<br />Based on the above analysis, the correct answer is B, color blindness, as it is the only option that is a sex-linked trait.