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boyduytu
2 năm trước
Biết rằng P thuần chủng, tương phản-> Đời F1 đồng tính-> Đời F2 phân tính. Quy luật di truyền nào cho tỉ lệ kiểu hình ở F2 là 3 : 1? Mỗi quy luật di truyền cho một ví dụ minh họa.
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Exercise 6: Read the definitions and complete the blanks with given words. bed alarm clock fridge chimney pillow dishwasher roof television air-conditioner lamp No. Definitions Word 1. The structure that covers or forms the top of a building or vehicle ............................. 2. A structure through which smoke or steam is carried up away from a fire, etc. and through the roof of a building; the part of this that is above the roof ............................. 3. A device that uses electricity, oil or gas to produce light ............................. 4. A piece of furniture for sleeping on ............................. 5. A piece of electrical equipment in which food is kept cold so that it stays fresh ............................. 6. A machine that cools and dries air ............................. 7. A piece of electrical equipment with a screen on which you can watch programmes with moving pictures and sounds ............................. 8. A machine for washing plates, cups, etc. ............................. 9. A square or rectangular piece of cloth filled with soft material, used to rest your head on in bed ............................. 10. A clock that you can set to ring a bell, etc. at a particular time and wake you up ............................. Giúp mik vs !! 5 *

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