Ploidy 唔係 chromosome number 喎
係講緊你有幾set chromosome
1 set 就haploid (n)
2 set 就diploid (2n)
3 set 就 triploid (3n)
如此類推
所以都可以用n代表1 set chromosome
Dse 都係跟依個definition,重點在於有幾多set chromosome
至於x 代表一set chromosome , 但重點在於計chromosome number,而唔係number of set
所以用4x代表tetraploid都算啱嘅
Somatic 同gametic chromosome number 只係一個相對概念,只可話你知個生物life cycle 嗰陣個somatic cell 同gametic cell 嘅chromosome number,根本代表唔到ploidy