The reasons for underrepresentation are often complex and multilayered, and some people may have intersecting characteristics which can result in multiple barriers being faced.
Mae’r rhesymau dros dangynrychiolaeth yn aml yn gymhleth ac yn aml-haenog, ac mae’n bosibl y bydd gan rhai pobl nodweddion croestoriadol a all arwain at wynebu nifer o rwystrau.