Karyotypes can be studied to determine an organism’s chromosomal makeup and to detect genetic defects. down syndrome is a genetic disorder that is also called trisomy 21. what would trisomy 21 look like in a karyotype?
a. missing chromosome 21
b. extra chromosome 21
c. missing sex chromosome
d. extra sex chromosome

The correct answer for the question that is being presented above is this one: "B. extra chromosome 21." Karyotypes can be studied to determine an organism’s chromosomal makeup and to detect genetic defects. Down syndrome is a genetic disorder that is also called trisomy 21. Trisomy 21 look like in a karyotype with extra chromosome 21

Ineed more info for this, i don’t quite understand what you’re asking.

The answer is c : ) hope this answered your question!