Question

Differentiate between sex-linked and sex-influenced traits.

Answer 1

Aspect	Sex-linked Traits	Sex-influenced Traits
Definition	Traits that are carried on the sex chromosomes are known as sex-linked traits.	Traits whose expression in a particular genotype depends on whether the individual is male or female.
Location of gene	The genes responsible for sex-linked traits are located on the sex chromosomes (X or Y chromosomes).	The genes responsible for sex-influenced traits are usually located on autosomes but show different expression in males and females.
Expression pattern	Expression is typically related to the presence or absence of a particular sex chromosome (e.g., X-linked).	Expression is influenced by the hormonal or sex environment of the individual, affecting phenotype differently in males and females.
Examples	Examples include haemophilia and colour blindness, which are sex-linked disorders found on the X chromosome.	No specific examples are given here, but these traits are influenced by the individual’s sex (male or female).