Question

what are chromosomes made of?
a. tetrads
b. gametes
c. carbohydrates
d. dna

Explanation:

Chromosomes are thread - like structures located inside the nucleus of cells. They are primarily made of DNA (deoxyribonucleic acid) and proteins. DNA contains the genetic information. Tetrads are structures formed during meiosis, gametes are reproductive cells, and carbohydrates are a different class of biological molecules not related to the composition of chromosomes.

Answer:

D. DNA