AGB 121: Principles of Animal Genetics and Population Genetics (2+1)

X LINKED INHERITANCE

• Certain sex linked genes are located only on X chromosomes and their alleles are absent from Y chromosome.
• These genes are called X linked genes; the characters controlled by these genes are called X linked characters and their mode of inheritance is called X linked inheritance.
• X-linked inherited diseases occur far more frequently in males because they only have one X chromosome.
• X linked inheritance may be X - linked dominant, X-linked recessive or X - linked co dominant.