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:State three types of saws and two types of planes…When sickle cell carrier marries a normal woman, the…In man haemophilia is recessive and sex linked, The…How many chromosomes will be in a gamete if the…If the number of chromosomes in the skin cells of…