Sex-linked Traits

Front

What is a sex-linked trait?

Back

A trait that is associated with a gene located on a sex chromosome, typically the X chromosome.

Front

Why is the gene for a disease or disorder more likely to be found on the X chromosome than the Y?

Back

The X chromosome has many more genes than the Y chromosome.

Front

What is a karyotype?

Back

A visual representation of an individual's chromosomes, used to assess chromosomal abnormalities.

Front

What does it mean when a woman is a carrier for a genetic disease?

Back

It means she has one gene for the disorder but does not exhibit the disorder herself.

Front

How is an individual's sex determined?

Back

By the presence of two sex chromosomes out of a total of 46 chromosomes.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an individual, while phenotype refers to the observable traits.

Front

What is the role of the Y chromosome in sex determination?

Back

The Y chromosome carries genes that determine male characteristics.

Front

Can a father pass on an X-linked trait to his son?

Back

No, a father cannot pass on an X-linked trait to his son because sons inherit the Y chromosome from their father.

Front

What is an example of a sex-linked trait?

Back

Color blindness is an example of a sex-linked trait, often found on the X chromosome.

Front

What does it mean for a trait to be recessive?

Back

A recessive trait is one that is expressed only when two copies of the gene are present.