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Across 3. sex linked gene are expressed in males because they only have one 6. when scientist use electrical current to separate DNA 8. how many types of blood are there 11. when meiosis occurs when homologous chromosomes fail to separate 12. has only the A antigen on red cells 14. Rh positive can only be given to 15. how many sex cells does a human have 16. males have these sex chromosomes 17. colorblindness is this type of disorder 22. When scientist analyze sections of DNA it is called DNA what 26. In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs are called 27. how many chromosomes does a sperm cell have 29. a fatal genetic disorder that causes the progressive breakdown of nerve cells in the brain. It deteriorates a person's physical and mental abilities during their prime working years and has no cure. 30. The universal red cell donor has this type 31. this determines if your blood is positive or negative 32. lack of skin pigment is this type of disorder 33. has both A and B antigens on red cells (but neither A nor B antibody in the plasma)

Down 1. what is the percentage of having a boy or a girl 2. what is the term for half the number of chromosomes 4. excess mucus in the lungs is the recessive allele disorder known as 5. in a pedigree chart a square represent 6. t’s inherited. Like eye color, blood type is passed through this process 7. if a female is born with only one X chromosome this results in the female having this disorder 9. has only the B antigen on red cells 10. picture of chromosomes fully condensed 13. nondisjuntion occurs results in baby having 3 (21 chromosomes) the baby will have 18. females have these sex chromosomes 19. if a male is born with multiple x chromosomes he will have this disorder 20. inherited form of anemia — a condition in which there aren't enough healthy red blood cells to carry adequate oxygen throughout your body. 21. dwarfism is this type of allele disorder 23. this parent determines the sex of the cell 24. human cells have how many chromosomes 25. diploid cell produced when sperm and egg unite 28. if an organism doesn't show a trait but passes it to the offspring the organism is said to be a 30. this is the most common blood type