The two normal types of sex chromosomes are? by Sunday | Sep 9 | Biology JAMB | 0 comments A. XXY and XYY B. XX and XYY C. XY and XXY D. XX and XY Correct Answer: Option D – XX and XYY Users Also Read These:How many chromosomes will be in a gamete if the…If the number of chromosomes in the skin cells of…When sickle cell carrier marries a normal woman, the…Which of the following statements about chromosomes…The haploid number of chromosomes in humans is?