Bài 6: Xét một nhóm tế bào sinh giao tử, mỗi tế bào xét một cặp gen dị hợp dài 5100 A0 nằm trên một cặp nhiễm sắc thể tương đồng. Gen trội A nằm trên nhiễm sắc thể thứ nhất có 1200 Ađênin,gen lặn a nằm trên nhiễm sắc thể thứ hai có1350 Ađênin.Nếu có một số tế bào trong nhóm tế bào giảm phân sinh giao tử xảy ra đột biến dị bội ở cặp nhiễm sắc thể chứa gen nói trên thì khi nhóm tế bào kết thúc giảm phân số lượng từng loại nuclêôtit trong mỗi loại giao tử là bao nhiêu?

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II. Put the verbs in brackets into the correct form. 1. I enjoy (play)………………….. football with my friends. 2. I (go)………………………………… swimming with you tomorrow. 3. They hate (paint)………………… but they like (swim)…………………………. 4. I think I (move) ………………………..to the city next year. 5. My sister likes (cook) ……………….very much. She can cook many good foods. 6. Every year, my mother (give)………………. me a nice doll on my birthday. 7. She loves (do)……………………………. the gardening. 8. Do you think you (meet)……………….. Hoa this weekend? 9. We (go)………………………….. to the cinema three times a month. 10. My hobby is (collect)………………….. stamps 11. What you (do)…………………………. in your free time? 12. Hoa (continue)…………………………….. this hobby in the future. 13. I don’t think we (have)………………………… free time. 14. My brother (listen)………………………… to music every day. 15. Nga (share) ………………………………..this hobby with anyone? 16. I think (make)……………………………. models is interesting. 17. I find (carve)…………………………….. wood boring 18. They (give)………………………………. a party next week. 19. We (live) ……….near Nam’s house , but we (not see)……………….. him very often. 20. Don’t worry. I (go) ………………..fishing with you next Saturday morning. 21. She expects (get) ………….…………. a pay rise next month. 22. His mother wants him (get) ………..…………… a good result in this semester. 23. I will refuse (work) ……………….….on Saturday and Sunday if I can’t get the double pay. 24. We promise (help) …………………..…….. him when he is in trouble. 25. Their friends hope (see) ………….……………… them again 26. The boss decided (go) ……………….…………….. abroad. 27. Miss Linda enjoys (work) …………..……………… with young children. 28. I start (work) ………………………. at 7:00 am every day. 29. I’m looking forward to (talk)……………….………to you soon. 30. Would you mind (open) ……………………………… the window? 31. They (not see)……………..the film Titanic yet. 32. Tom( call)………………his boss recently. 33.John( not read)…… …………..the letter from Mary yesterday. 34. We(not begin)… ………….to learn for the test yet. 35.I( meet)…… ……………..Robert at the supermarket 2 days ago. 36. Nancy(be)…………………to VietNam several times. 37. I(not see)…………your brother yet. 38. My pen isn’t here any more. Someone(take)……………….it alrea