I'm trying to understanding base pairing. So every linear chromosome is a double stranded double helix. Is this double stranded property the same as saying an organism is diploid? Or do the chromosomes of a haploid eukaryotic organism, like a member of Fungi, each have 2 strands (with the purines always pairing w/ pyrimidines), which would imply that diploids organisms actually have 4 strands?
EDIT: Part of my confusion comes from the fact that in diploid organisms, each parent gives 1 chromosome to the child. If the double stranded property is the same as saying an organism is diploid, does this mean that say if a nucleotide on one chromosome is A, then the nucleotide on the other chromosome in the same loci must be T? Doesn't chromosome mean a paired up strand, not a single strand?