Question

____ are rod - shaped and paired structures made of dna and are located in the nucleus of a cell.
a chromosomes
b genomes
c genes
d genetic markers
e nucleotides

Explanation:

Chromosomes are rod - shaped, paired structures made of DNA located in the cell nucleus. Genomes are the complete set of an organism's genetic material. Genes are segments of DNA. Genetic markers are specific DNA sequences. Nucleotides are the building blocks of DNA.

Answer:

A. Chromosomes