MCQ PracticeDown's syndrome is characterised bySubject: BiologyTopic: Genetics And EvolutionA21 st trisomyBtwo X and Y-chromosomeC19 trisomyDonly one X-chromosomeCorrect Answer: APractice QuizBack to MCQsRelated MCQsCurrent flows in a circuit whenEighttenths coulomb passes a point in 4 s. The current in amperes isThe unit of electrical charge is the