Which answer would score higher? Not sure where to start? Explain this Answer A Females have XY sex chromosomes and males have XX sex chromosomes. Sample K is XX, so it came from a genetically male baby; sample L is XY, so it came from a genetically female baby. Answer B Females have XX sex chromosomes and males have XY sex chromosomes. Sample K is XX, so it came from a genetically female baby; sample L is XY, so it came from a genetically male baby.