Genetics question

Twin Mom 👩‍👧‍👦💕💙 • Mommy of 2 👩‍👧‍👦 #twins💙💕

Hey everyone I’m pregnant with twins on 14weeks & 4day. I did my genetic and diabetes test about a week ago and they called this morning with the results. Everything came back negative and I also passed my genetics test they had the gender results of one of the babies which was a boy but didn’t know the other my question to you all is does the genetics test (Down syndrome) go for both babies or just the one they have the gender of?