A karyotype was examined, and it was noted that the individual had trisomy 18. If the rest of the karyotype was correct (normal), how many chromosomes would you expect to see?
A normal human karyotype has 46 chromosomes, consisting of 22 pairs of autosomes and 1 pair of sex chromosomes. In the case of trisomy 18, there would be an extra copy of chromosome 18, resulting in a total of 47 chromosomes.
