ability to grow long hair in females
colour of the skin in humans
ability to roll the tongue
possession of facial hair in adult humans
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The ability to grow long hair in females is controlled by a gene located on the X chromosome. Since females have two X chromosomes (XX) and males have one X chromosome and one Y chromosome (XY), the gene for the ability to grow long hair in females is present in both of a female's X chromosomes. In contrast, a male has only one X chromosome, so if he inherits the gene for long hair on his X chromosome, he will express that trait.
Facial hair in adult humans, on the other hand, is not controlled by genes located on the s*x chromosomes. Rather, facial hair growth is determined by a complex interplay of hormones, including testosterone, which is produced in greater amounts by males. Therefore, while males are more likely to develop facial hair than females, it is not a s*x-linked trait in the same way that the ability to grow long hair in females is.
In conclusion the correct option as actually (A), the ability to grow long hair in females is an example of a s*x-linked trait because it is controlled by a gene located on the X chromosome, while facial hair in adult humans is not a s*x-linked trait.
Facial hair in adult humans is a s*x-linked trait because it is primarily influenced by hormones such as testosterone, which are present in higher levels in males due to their XY chromosome pattern. This trait is typically inherited in a pattern consistent with s*x-linked inheritance, with males more likely to exhibit facial hair than females.
