Question

Sol.(a) [Key Concept: Turner's Syndrome — 45,XO] A human female with Turner's syndrome HAS 45 CHROMOSOMES WITH XO (monosomy X). She has only one X chromosome and no second sex chromosome (neither X nor Y). Features: short stature (the most common feature, apparent by age 5), webbed neck, ovarian dysgenesis (streak gonads), primary amenorrhoea, infertility, and normal intelligence in many cases. She does NOT have additional X chromosome (that would be 47,XXX), does NOT exhibit male characters (she is female phenotype), and CANNOT produce children (infertile due to ovarian failure).