What are sex-linked traits and how are they inherited?

What are sex-linked traits and how are they inherited?


Also why will a son not inherit male pattern baldness from his father.

What are sex-linked traits and how are they inherited?
Sex-linked traits are exactly that; traits that are inherited according to gender. For instance, hemophilia requires both defective recessive genes, one from the mother, and one from the father.





In the case of baldness, the son cannot inherit the gene from his father because his father is already giving him the Y chromosome, which makes him a male. Many sex-related diseases today are found only on the X chromosome. Therefore, the male son (XY chromosomes), can only inherit the gene from his mother.
Reply:Through the genonomes (genes). It has alot to do with math and statistics. Similar to a deck of cards being shuffled and then dealt out. The luck is in the draw. But that is the unique aspect of genes,, certain things are only carried by one parent as a resessive gene. Such as color blindness and male pattern baldness, these are ALWAYS carried by the mother.
Reply:Sex linked traits are alleles that are on sex chromosomes. More often on female X chromosomes, as the X chromosome is larger and not as full of deleterious mutation as the Y chromosome. Take hemophilia, a X linked disease that is passed on to progeny with variance. Men, having only one X, have a much better chance of expression the condition, than females, who have two X's and can mask expression statistically more often.





Male pattern baldness comes down the female line, I think.