题干

下表为3个不同小麦杂交组合及其子代的表现型和植株数目下列推断错误的是  (  )

A:6个亲本都是杂合体

B:抗病对感病为显性

C:红种皮对白种皮为显性

D:这两对性状自由组合

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答案(点此获取答案解析)

B

同类题5

阅读理解

    On one evening 30 years from now, you might sit down to a table and get ready to have your dinner. What will you be eating? Will the food still be the same as it is now? Here are a few possible choices for the future.

Insects

    Insects take up little space and don't make much waste. They also have more protein than beef, chicken and pork. This makes insects another possible food of the future. Most people probably won't want to see the insects they eat. So in the future, people will first turn insects into powder to make with other foods like chips and biscuits.

Vegetable meat

    A new kind of burger(汉堡包)is now popular in the United States. It looks and tastes the same as any other burgers. But it's actually a "beef" burger made out of plants. People use peas and potatoes to make the "beef". They take coloring, protein and fats from these plants and mix them together.

Algae(藻类)

    It is said that algae farming could become the world's biggest farming in the future. Algae is cheap and grows, very quickly. Also, it is very good for people. It has much more protein and oil than many other plants. People may also use algae oil and algae butter in the future. Some algae has a strong taste.

Manmade meat

    Meat grown in labs might be another kind of future food. People use stem cells(干细胞) from animals to grow the meat. Chicken, beef, and pork can all be made this way. Manmade meat can be healthier than traditional meat. People can control what type of fat goes into the meat. They can choose only healthy fats.