5.3.1 Mendelian inheritance has its physical basis in the behavior of chromosomes

摩尔根黑转粉孟德尔

Morgan discovered the first evidence indicating that a specific gene is associated with a specific chromosome

5.3.2 Sex-linked genes exhibit unique patterns of inheritance

X chromosome recessive:

• male patients > female patients
• If a female has the disease, her father and son must have the disease too

X chromosome dominant:

• female patients > male patients
• If a male has the disease, his mother and daughter must have the disease too