31. Sugars also reveal a cell's tissue type , stage of development and even if it is in a diseased state. 32. Dr . Kuliev said : " If you combine genetic screening with tissue typing there is no ethical problem. 33. This suggests that this NMD avoidance mechanism may be prevalent in other tissue types for a variety of genes. 34. Genetic screening of embryos from affected couples combined with tissue typing could provide a source of cells for transplant. 35. He needs a bone marrow transplant, and his parents were hoping to produce a sibling whose tissue type matched. 36. For the first time we can start considering this as a source of cell or tissue types for transplant, 37. If we can screen an embryo for tissue type , won't we one day screen for eye color or intelligence? 38. He needs a bone marrow transplant and his parents were hoping to produce a sibling whose tissue type matched. 39. Warnack also encourages companies to consider paying an extra $ 30 a person to have each donor's tissue typed completely. 40. Indeed, the expression levels of Mfn1 and Mfn2 vary according to cell or tissue type as does the mitochondrial morphology.