| 31. | Lactose intolerance is not an immune response, but rather a sensitivity to dairy caused by lactase deficiency.
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| 32. | Subsequent research revealed intolerance was more common globally than lactase persistence, and that the variation was genetic.
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| 33. | Lactase is an enzyme that breaks down the disaccharide lactose to its component parts, glucose and galactose.
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| 34. | Mutations which may have developed allelic variations which code for lactase production into adulthood are simply neutral mutations.
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| 35. | Additional digestive enzymes produced by these glands include dipeptidases, maltase, sucrase, lactase, and enterokinase.
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| 36. | :Only mammals have lactase, the enzyme necessary to break down lactose, in their digestive systems.
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| 37. | :: : Some human populations have developed Lactase persistence, in which lactase production continues into adulthood.
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| 38. | :: : Some human populations have developed Lactase persistence, in which lactase production continues into adulthood.
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| 39. | The changes were found by studying the sequence of DNA units near the lactase gene in nine Finnish families.
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| 40. | The lactase promoter is 150 base pairs long and is located just upstream of the site of transcription initiation.
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