21 trisomy in humans causes | vedclass

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Question

Disorders
			Autosomal/Sex Linked
			Symptoms
			Effects
		
		
			Down's syndrome
			Autosomal aneuploidy $($trisomy,

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Down's syndrome

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Disorders Autosomal/Sex Linked Symptoms Effects Down's syndrome Autosomal aneuploidy $($trisomy, $+21)$ Mongolian eyefold (epicanthus), open mouth, protruded tongue, projected lower lip, many loops on finger tip, palm crease Retarded mental development $IQ\, ($below $40)$ Turner's syndrome Sex chromosomal monosomy $44$ $+ XO$ Short stature females $\left( < 5^{\prime}\right)$ webbed neck, body hair absent menstrual cycle absent. sparse pubic hair, underdeveloped breasts narrow lips puffy fingers $ < $ span $ > \left\langle/ 5^{\prime}\right),>$ Sterile hearing problem Klinefelter's syndrome Sexchromosomal aneuploidy (tri/tetrasomy of $X$ chromosome) $44+ XXY$ $44+ XXXY$ The males are tall with long legs, testes small, sparse body hair, Barr body present, breast enlargement Gynaecomasti a azospermia sterile

$21$ trisomy in humans causes

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