A Karyotype Test Determines Chromosome Count.Whatever the age, the test used to diagnose Turner syndrome is the same—and it is known as a karyotype. A karyotype is a blood test that produces an image of your chromosomes.
I would go for D or A! :)
Answer:
James Watson and Francis Crick were mainly the first to build a model of a DNA structure. (Your welcome).
Explanation:
