Thread-like structures that are found in the nucleus of a cell that contains all DNA. * A. DNA
B. Genes
C. Chromosomes
D. Nucleus

chromosomes

Explanation:

Thread-like structures that are found in the nucleus of a cell that contains all DNA. Each chromosome is made of protein and a single molecule of DNA. Human cell nucleus contains 46 chromosomes or 23 pairs. Half of these chromosomes come from one parent and half come from the other parent.

answer; a male inherits only one allele of the x-linked gene controlling hair color;