AP BIOLOGY

Detailed explanation-1: -A karyotype test examines blood or body fluids for abnormal chromosomes. It’s often used to detect genetic diseases in the developing fetus.

Detailed explanation-2: -A chromosomal karyotype is used to detect chromosome abnormalities and thus used to diagnose genetic diseases, some birth defects, and certain disorders of the blood or lymphatic system. It may be performed for: A fetus, using amniotic fluid or chorionic villi (tissue from the placenta):

Detailed explanation-3: -The laboratory specialist uses a microscope to examine the size, shape, and number of chromosomes in the cell sample. The stained sample is photographed to show the arrangement of the chromosomes. This is called a karyotype. Certain problems can be identified through the number or arrangement of the chromosomes.

Detailed explanation-4: -For karyotyping the chromosomes must be isolated from cells in the metaphase, which is the stage of the cell cycle in which the chromosomes assume their characteristic condensed, discrete shape.