4. What are the two types of gametes in humans? How many chromosomes are found in each human gamete? Are human gametes haploid (n) or diploid (2n). 5. What is crossing over and in which stage of meiosis does crossing over occur? 6. What is the biological significance of crossing over? 7. At the end of meiosis, how many daughter cells are produced? Are the daughter cells haploid or diploid? Are the daughter cells genetically identical or different from each other?