Ở người, gen quy định dạng tóc nằm trên nhiễm sắc thể thường có 2 alen, alen A quy định tóc quăn trội hoàn toàn so với alen a quy định tóc thẳng; Bệnh mù màu đỏ - xanh lục do alen lặn b nằm trên vùng không tương đồng của nhiễm sắc thể giới tính X quy định, alen trội B quy định mắt nhìn màu bình thường. Cho sơ đồ phả hệ sau:   Biết rằng không phát sinh các đột biến mới ở tất cả các cá thể trong phả hệ. Cặp vợ chồng III.10 – III.11 trong phả hệ này sinh con, xác suất đứa con đầu lòng không mang alen lặn về hai gen trên là         

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Một số câu hỏi khác có thể bạn quan tâm.

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

  More and more people are becoming addicted to the Internet and finding it difficult for them

  to stop using it.

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

  Mobile phones have had a significantly impact on telephone networks.

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

  Mobile phone subscriptions now outnumber fixed-line one in many markets.

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

  The sale of mobile phones in 2005 was totally about 816.6 million subscribers with that

  figure being almost equally sharing among the markets.

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

  Nearly 2,000 people climbing Mount Everest and at least 202 have died when trying to

  summit the mount, and the corpses have been left on the mountain.

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

  Brent Bishop is the leader of the Sagarmatha Environmental Expedition (SEE), a nonprofit

  organization which established to clean Everest.

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

  The US’s oil consumption is approximately 21 million barrels a day, howeve production

  that is only 6 million barrels a day.

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

  Over two decades Vietnam has emerged as an important regional produce of oil and natural

  gas in Southeast Asia.
  
  
  

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

  Half of Vietnam’s domestic energy consumption come from oil, with hydropower 20%, coal

  18%, and natural gas 12%.

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

  While those efforts have helped Vietnam expand production of oil and natural gas, domestic

  consumption of these resources has also increased as a result of rapid economic grow.