Answer :
Answer: Sex-linked traits are traits or conditions that are determined by genes located on the sex chromosomes, particularly the X chromosome. In humans, sex chromosomes are designated as X and Y, with females having two X chromosomes (XX) and males having one X and one Y chromosome (XY).
Here is the definition of a sex-linked trait:
Definition: A sex-linked trait is a genetic characteristic that is located on one of the sex chromosomes, typically the X chromosome. These traits can be passed from one generation to the next in a sex-specific pattern due to the differences in the number of X and Y chromosomes between males and females.
Inheritance:
X-linked Traits: Traits that are located on the X chromosome are referred to as X-linked traits. Since males have only one X chromosome, any mutation on the X chromosome will be expressed in males if inherited. In females, the presence of two X chromosomes allows for the possibility of carrying a mutated gene without expressing it.
Examples:
Color blindness: A common X-linked trait where the gene for color blindness is located on the X chromosome. Males are more likely to be color blind because they only inherit one X chromosome.
Hemophilia: Another well-known X-linked trait, hemophilia is a blood disorder caused by a mutation on the X chromosome. Males with the mutation are more likely to exhibit symptoms of hemophilia.
Patterns of Inheritance:
Recessive X-linked Traits: Inheritance of recessive X-linked traits follows a specific pattern. Males are more likely to express the trait if they inherit the mutated gene on their X chromosome, whereas females need to inherit two copies of the mutated gene (one on each X chromosome) to exhibit the trait.
Understanding sex-linked traits is crucial in genetics and inheritance studies, as they demonstrate unique inheritance patterns based on the presence of X and Y chromosomes in individuals
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