Ở tằm, alen A quy định trứng màu trắng, alen a quy định trứng màu sẫm. Phép lai nào sau đây có thể phân biệt con đực và con cái ở giai đoạn trứng?

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Find a mistake in the four underlined parts of the sentence and correct it:

  John said that he was going to visit his grandparents tomorrow.

• Find a mistake in the four underlined parts of the sentence and correct it:

  Disease, pollute, and limited distribution are factors that threaten various plant and animal species.

• Find a mistake in the four underlined parts of the sentence and correct it:

  If a species does not have the natural genetic protection against particular diseases, an introduced disease can have severely effects on that species.

• Choose the best answer for the following sentence:

  _________________, for instance, might find it hard to laugh at a Russian joke.
   

• Choose the best answer for the following sentence:

  As he hated ________________, he decided to desert.
   

• Find a mistake in the four underlined parts of the sentence and correct it:

  Last week Mr. Bruce must interview five people for the new management position

• Find a mistake in the four underlined parts of the sentence and correct it:

  Please empty that bowl of fruit and separate the fresh apples with the old apples.

• Choose the best answer for the following sentence:

  The nearest cinema is only _______________________.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  After Newton has observed an apple fall to the ground, he formulated the law of gravity.

• Choose the best answer for the following sentence:

  A shoe of leather is a _____________________.