The genotype of females XX allows them to carry the disorder but feel no symptoms. Males XY only have one X so if its affected they will experience symptoms.
What type of chromosomes are related to sex linked disorders?
X
We use crosses to show us the inheritance of sex-linked disorders as well as showing how common they are in each sex.
Blood clotting disorder caused by a recessive allele.
Haemophilia
The letter H is used for haemophilia alleles.
Pedigree diagram show the lineage of a family.
Sex linked disorder must always have two sex chromosomes (XX or XY) with a superscript allele letter on one/both X chromosomes.
