user-avatar
mrkien0605
2 năm trước
Ở một loài thực vật, sự sinh sản hữu tính qua các thế hệ chỉ bằng hình thức tự thụ phấn. Thế hệ P có thành phần các kiểu gen gồm: 0,5 AA : 0,2 Aa : 0,3 aa. a) Qua 2 thế hệ tự thụ phấn thì thành phần các kiểu gen ở thế hệ F1, F2 như thế nào? b) Em có nhận xét gì về quy luật biểu hiện di truyền qua các thế hệ tự thụ phấn? Biết rằng không có đột biến xảy ra.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

V.Chọn đáp án đúng để hoàn thành câu bằng cách khoanh tròn chữ cái A,B,C hay D 1. Nam______ English on Monday and Friday. A. not have B. isn’t have C. don’t have D. doesn’t have 2. When it becomes hot, people often feel ______ A. hungry B. thirsty C. happy D. worried 3. Do children have math on Monday ? - ______. A. Yes, they have B. No, they don’t C. Yes, they don’t D. No, they not have 4. Mr. Nam gets up at 7.00 and eats ______. A. a big breakfast B. the big breakfast C. big breakfast D. a breakfast big 5. Is her school ______ the park? A. in front of B. next C. in front to D. near to 6. Is this her ______? A. erasers B. books C. an eraser D. eraser 7. Tan likes ______ weather because he can go swimming. A. hot B. cold C. windy D. foggy 8. ______ straight across the road. A. Don’t run B. Not run C. No run D. Can’t run 9. I hope the ______ can repair our car quickly. A. mechanic B. reporter C. architect D. dentist 10. The traffic lights are red, so you ________ stop now. A. can B. must C. mustn’t D. can’t 11. ______ fruit does your father produce? A. How much B. How many C. How long D. How often 12. We go to school at ______ in the morning. A. a quarter to seven B. seven to a quarter C. seven quarter D. a quarter seven to 13. There ______a cupboard, a dishwasher and a table in the kitchen. A. be B. are C. is D. am 14. I’m playing table tennis . _______ you like table tennis? A. Have B. Is C. Are D. Do 15. There is an English examination ______ Friday, 11th December. A. at B. in C. to D. on 16. What time _____ back? A. is she coming B. comes she C. she does come D. does she comes 17. The students have got ______ news about their exams. A. many B. some C. any D. a 18. The boy looks a little thin, ______ he is strong. A. and B. for C. or D. but 19. ________and _______ would like to join the English Club speaking. A. Marry/me B. I/ Marry C. me/ Marry D. Marry/ I 20. There isn’t _______ milk in the glass. A. a B. an C. any D. some VI.Cho dạng đúng của động từ trong ngoặc a. You (1. wait)_____________ for our teacher? b. Mrs Brown ( 2. not live) _______in town. She ( 3. live) ________ in a house in the country. c. I ( 4. not understand)_________this sentence. What this word ( 5. mean)___________? d. I don’t want (6. cook)__________tonight. Let’s (7. eat)______________out. e. Be quiet! The baby ( 8. sleep)____________. She ( 9. take)____________her afternoon nap. f. We can’t (10. go out) ________________ for a swim because it is raining. VII. Cho dạng đúng của từ in hoa 1. I have a sister. She is a ______________________________________. 2. The ______________________________is to the right of the drugstor. 3. Paul turns out to be the _____________________student in our school. 4. He greets me in a _______________________________________way. 5. Do you know what her _____________________________________is? 6. I like drinking fruit juice, especially ____________________________. 7. Is Phu Tho a _______________________________________province? 8. His ______________________________________are small and white. 9. Near my house, there is a market. It is very_______________________. 10. Sometimes, they go _________________________ to the countryside. 10,POLICE 1,BAKE 2,GOOD 3,FRIEND 4,NATION 5,LEMON 6.MOUNTAIN 7,TOOTH 8,NOISE 9.PICNIC

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team