sons b) % carrier daughters and % normal daughters c) % colourblind sons and % normal sons d) All carrier offsprings . Down's syndrome is a genetic disorder which is caused by the presence of an extra chromosome number a) b) c) d) . Klinefelters’ syndrome is characterized by a karyotype of a) XYY b) XO c) XXX d) XXY . Females with Turners’ syndrome have a) Small uterus b) Rudimentary ovaries c) Underdeveloped breasts d) All of these .
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