Cho cây hoa đỏ P tự thụ phấn, thu được F1 gồm 56,25% cây hoa đỏ: 37,5% cây hoa hồng và 6,25% cây hoa trắng. Cho tất cả các cây hoa hồng ở F1 giao phấn với nhau, thu được F2. Biết rằng không xảy ra đột biến, theo lý thuyết tỷ lệ kiểu hình ở F2 là:

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the word that has the underlined part pronounced differently from the rest:

  protect                  commercial                 construction                climate

• Choose the correct sentence which is built from the words and phrases given:

  we / dependent / nature / cannot survive ourselves / without wildlife
  
  

• Choose the correct sentence which is built from the words and phrases given:

  environmental education / help / spread / environmental awareness / share practical techniques / solve the environmental problems
  
  

• Choose the correct sentence which is built from the words and phrases given:

  we / engage / individuals / appreciate nature / the relationship / they have with wildlife
  
  

• Choose the correct sentence which is built from the words and phrases given:

  everyone / pick up / one piece of trash / a day / about 6.6 billion pieces less
  
  

• Choose the best answer for the following sentence:

  He isn't the type of person who wants to stay in the job for a long time. ____________, I'm sure he's happy at present.
   

• Choose the best answer for the following sentence:

  ____________ I had a lot of problems with studying by myself most of the time at university.
  
  

• Choose the best answer for the following sentence:

  I'm afraid to say that you didn't come first in the examination. ___________, you did come second.
   

• Choose the best answer for the following sentence:

  I must say that you have done very well in your first month here, especially when your family is not around. _____________, you should be aware that it is just the beginning of the school year.
   

• Choose the best answer for the following sentence:

  _____________ I don't completely mess up my university final exams, I should graduate from Cambridge next June.