IPA: /ˌjuːnɪˈpɛrəntəl/
KK: /junɪˈpɛrənˌtəl/
Relating to or derived from only one parent.
In some species, uniparental inheritance can lead to unique genetic traits.
Uniparental → It is formed from "uni-" (meaning one) and "parentalis" (from "parens", meaning parent). The word describes a situation involving one parent.
Think of 'one' ('uni-') parent ('parens') — that's why uniparental refers to something involving a single parent.