Một quần thể có 1050 cá thể AA, 150 cá thể Aa, 300 cá thể aa. Vậy tỉ lệ của kiểu gen đồng hợp trội trong quần thể là bao nhiêu?

Các câu hỏi liên quan

I. Choose the best one (A, B, C or D) to complete the sentence or replace the underlined word. 1. At this time next week we _______ to work to support the air pollution cutting down campaign. A. are cycling B. will be cycling C. will cycle D. will be cycled 2. Someone’s carbon _______ is a measurement of the amount of carbon dioxide that their activities produce. A. footprint B. energy C. effect D. amount 3. Remember to _______ the lights before going to bed. A. turn on B. stop C. turn D. turn off 4. We will cut down in the use of natural gas because it is _______ and harmful to the environment. A. available B. abundant C. plenty D. limited 5. Hydro power is _______ because dams cannot be built in certain areas. A. abundant B. enough C. limited D. unlimited 6. _______ source of energy is the source that can’t be replaced after use. A. Effective B. Non-renewable C. Renewable D. Natural 7. Which of the following is NOT renewable source of energy? A. wind B. coal C. hydro D. solar 8. We are looking for cheap, clean and _______ sources of energy. A. serious B. dangerous C. effective D. efficient 9. By the middle of the 21st century, people in developing countries _______ more renewable energy. A. used B. have used C. uses D. will be using 10. If we go on _______ electricity, we will have to pay a lot next month. A. turning on B. widened C. wasting D. increasing 11. Biogas is _______ and cheap for cooking and heating. A. serious B. expensive C. plenty D. abundant 12. We should put _______ on our roof for the heating and hot water. A. equipment B. cracks C. solar energy D. solar panels 13. In many countries, people think that electricity, gas and water are not luxuries but _______ . A. necessities B. appliances C. sales D. consumers 14. We should use _______ light bulbs in our homes. A. a bit energy B. efficient C. low energy D. little energy 15. A hydropower station _______in the North of the country next year. A. will be built B. has been built C. was built D. were built