In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of these pairs, such as pair 14, which of the following do the two chromosomes of the pair have in common?
-Length and position of the centromere only.
-Length, centromere position, and staining pattern only.
-Length, centromere position, staining pattern, and DNA sequences.
-Length, centromere position, staining pattern, and traits coded for by their genes.
-They have nothing in common except they are X-shaped.