Question

what does a karyotype show?
○ genetic abnormalities
○ relationships among family members
○ carriers of a genetic disorder in a family
○ alleles on each chromosome

Explanation:

A karyotype is a visual representation of an individual's chromosomes, arranged by size, shape, and number. It is used to detect chromosomal abnormalities (like extra or missing chromosomes, or structural changes) which are genetic in nature. Relationships among family members are determined by pedigree analysis or DNA profiling for relatedness, not karyotypes. Identifying carriers of a genetic disorder in a family is also done via pedigrees or genetic testing for specific alleles, not karyotypes (which show chromosome structure/number, not specific alleles on chromosomes). Alleles are specific gene variants, and karyotypes don't show the alleles on each chromosome—they show the chromosome's overall structure and number. So the correct option is the one about genetic abnormalities.

Answer:

A. genetic abnormalities