Questions: Answer these before color-coding the reverse side of this page. 1. Why are the chromosomes paired up?

Chromosome pairing refers to the lengthwise alignment of homologous chromosomes at the prophase stage of meiosis. ... For these organisms to produce cells with a single set of chromosomes, the sets have to be separated such that the daughter cells have one copy of each chromosome. The 22 pairs of homologous chromosomes contain the same genes but code for different traits in their allelic forms since one was inherited from the mother and one from the father. So humans have two homologous chromosome sets in each cell, meaning humans are diploid organisms.

Explanation:

format change of dna.  

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