Where do autosomal traits and sex-linked traits exist?

1 Answer
Nov 2, 2015

Autosomal traits exist in all the chromosome pairs (1-22) except X and Y; sexlinked traits only exist on X and Y and expression depends on the sexx of the offspring.


Autosomal Dominant traits:
If an offspring inherits an autosomal dominant trait one of their chromosomes and the recessive form on the other one (Dominant on 10 and recessive on the other 10), they will exhibit that trait.

Autosomal recessive traits:
An offspring must inherit two recessive forms of the gene on both of the chromosomes within a pair. Recessive on 10 and another recessive on the other 10, the offspring will exhibit the recessive trait.

Sexlinked traits depend on the sexx of the offspring. An X-linked recessive trait will be exhibited by a male offspring because he doesn't have another X chromosome to counteract the recessive gene. A female would have to inherit two X chromosomes with the recessive gene in order to exhibit that trait. Concequently, her father would also show the same trait but her mother may not. Men have only X and Y, where women have to X's. All traits on Y chromosomes will be expressed by all men in that family, there is no dominance/recessiveness.