Trisomy is having 3 chromosomes but then what is partial trisomy ?. I was reading about Patau syndrome and it is called trisomy 13 ( because instead of usual 2 chromosomes,it has 3 chromosomes). it was also wriiten that 20% cases are PARTIAL TRISOMIC...what is the meaning of partial trisomic?
Any organism with a partial polyploidy has got some tissues with a different number of chromosome set, unlike the rest of cell tissues. These situations are often consequences of meiosis error and are more common in plants than in any other organism.