5.4 Variability & Genetics- Sex-Linked Inheritance

Sex-Linked Inheritance:

• Alleles that are carried on the X chromosome are described at sex-linked.
• Any recessive genes that are carried on a male's X chromosome will not have a normal X chromosome to prevent them from being effective, as they instead have a Y chromosome that contains few genes.
• Therefore the recessive gene is unpaired and there is no dominant gene present.
• This is known as sex-linkage.
• The gene cannot be passed from a male to his sons.
• …