TO. YOUR. BRAIN. have a nice day?
A) Record the line that the bottom of the meniscus touches is the technique
The right answer is D.
This subject has a normal karyotype in terms of chromosome number.
In Kleinfelter's syndrome a karyotype with 2X and a Y (XXY) is observed, and the subject is male (there is no Y chromosome in the image).
In Turner syndrome, there is only one X chromosome (in this karyotype there are two).
In Trisomy 21 we observe three chromosomes 21 (in the picture there are two).