Khi lai thứ lúa thân cao, hạt gạo trong với thứ lúa thân thấp, hạt gạo đục thu được F1 toàn thân cao, hạt đục Cho F1 tự thụ phấn thu được F2 gồm 15600 cây với 4 kiểu hình trong đó có 3744 cây thân cao, hạt trong. Biết rằng mỗi cặp tính trạng chỉ do 1 gen qui địnhvà mọi diễn biến của nhiễm sắc thể trong giảm phân ở tế bào sinh trứng và tế bào sinh hạt phấn là giống nhau. Tần số hoán đổi gen của F1 là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  “Did you go sailing last weekend?”

  “No. We would have gone ___________ nicer.”
  
  

• Choose the best answer for the following sentence:

  This sailboat ____________ go faster if there were more wind.
   

• Choose the best answer for the following sentence:

  I won’t lend you this money _________ you promise to pay it back.
   

• Choose the best answer for the following sentence:

  If Tony had come sooner, he could ___________ eaten dinner with us.
   

• Choose the best answer for the following sentence:

  “Are you thinking about going to Nha Trang for the holidays?”

  '‘No, but if I ___________ the time. I would definitely go.”
   

• Choose the best answer for the following sentence:

  “It's really raining.” “Yes. If the weather ___________, we’ll have to camp somewhere else.”
   

• Choose the best answer for the following sentence:

  “My boss made me work overtime again.” “If I were you, I ___________ my job.”
   

• Choose the best answer for the following sentence:

  “Thank you for your help.” “ ___________ want more information, call again tomorrow.”
  
  

• Choose the best answer for the following sentence:

  “Remember the day I drove you to the airport?”

  “If you hadn’t ___________ me, I would have been late.”
  
  

• Choose the best answer for the following sentence:

  “Sally finally got here from Chicago.” “If she had come earlier, we _________ taken her to the play.”