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Name _________________________ Date ___________________ Per ______ Reyes Life’s Greatest Miracle, Part I 1. How many cells are in our body? 2. What is fundamental (central) to life? 3. What is DNA good at? 4. In sexual reproduction, what kind of offspring is produced? 5. How many sperm are produced per second? 6. What is the final result of meiosis? 7. What does diversity increase the odds of? 8. From the ovary, where does the egg go? _______________________ Where does it go after? ________________________ 9. What sweeps the egg along the Fallopian tube? 10. Why are sperm in peril once in the vagina? 11. What happened to the cervix after a few months? 12. What must sperm do to fertilize an egg? 13. What happens to sperm if proteins match with an egg? 14. Where does fertilization take place? 15. How soon after fertilization do the bundle of cells go to the uterus? 16. What happens in the 6th day after fertilization? 17. How many layers of cells make up the embryo? 18. What happens when genes are turned on? Life’s Greatest Miracle Part II 1. How do cells talk to each other? 2. When is the earliest time that sex of a fetus can be detected? 3. 4. Girls have the chromosome __________. Boys have ___________. The SRY gene in the Y chromosome is responsible for the production of which organ? 5. When does the embryo become a fetus? 6. How is the fetus fed? 7. When does bone begin to form? 8. Where is a crucial organ in which fat is being laid down? 9. Which part of a neuron has fat? 10. How much does a mother’s blood supply increase during pregnancy? 11. During childbirth, how much does the cervix widen? 12. Why are our pelvises more narrow? 13. Which procedure has decreased death rates of mothers during childbirth?