What are traits called when they are controlled by genes located on the sex chromosomes?

What are traits called when they are controlled by genes located on the sex chromosomes?

• A. Autosomal Traits
• B. Sex-Linked Traits
• C. Codominant Traits
• D. Polygenic Traits

Answer: (B)

Traits that are controlled by genes located on the sex chromosomes are referred to as sex-linked traits. These traits are often associated with the X or Y chromosomes in humans and other organisms. Since females typically have two X chromosomes and males have one X and one Y chromosome, the inheritance patterns for these traits can differ significantly between the sexes. For instance, certain genetic conditions such as hemophilia and color blindness are more commonly observed in males because they are linked to genes on the X chromosome. Males, having only one X chromosome, will express any recessive allele present on it, while females would need two copies of a recessive allele on their X chromosomes to express the trait. Understanding sex-linked traits is crucial in genetics, as it helps explain the inheritance patterns and prevalence of certain traits and conditions in different populations.

Traits that are controlled by genes located on the sex chromosomes are referred to as sex-linked traits. These traits are often associated with the X or Y chromosomes in humans and other organisms. Since females typically have two X chromosomes and males have one X and one Y chromosome, the inheritance patterns for these traits can differ significantly between the sexes.

For instance, certain genetic conditions such as hemophilia and color blindness are more commonly observed in males because they are linked to genes on the X chromosome. Males, having only one X chromosome, will express any recessive allele present on it, while females would need two copies of a recessive allele on their X chromosomes to express the trait.

Understanding sex-linked traits is crucial in genetics, as it helps explain the inheritance patterns and prevalence of certain traits and conditions in different populations.