What is the definition of set of chromosomes? Does it differ from pair of chromosomes?
closed as off-topic by canadianer, David, user22020, kmm, fileunderwater Oct 25 '17 at 10:39
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Yes those two expressions refer to different things.
Set of chromosome
The term "set of chromosome" refers to ploidy number. A haploid has one set of chromosome, a diploid has two sets of chromosomes, an hexaploid has six sets of chromosomes.
In humans, each set of chromosome is made of 23 chromosomes (22 autosomes and 1 sex chromosome).
Pair of chromosome
A pair of chromosome refers to the two homologous chromosomes in a diploid individual (one chromosome from each set for a given chromosome number).
Source of information
If the above is unclear, then you should have a look at any intro course to genetic such as these courses by Khan Academy for example.