Question

a white blood cell is useful for karyotyping.
a true
b false

Explanation:

Karyotyping involves analyzing the chromosomes of a cell. White blood cells (leukocytes) are commonly used in karyotyping because they are easily obtainable (via a simple blood draw) and can be induced to divide in a laboratory setting (using mitogens). During cell division (mitosis), chromosomes condense and become visible under a microscope, allowing for their accurate counting and analysis.

Answer:

A. True