题目内容
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[主观题]
A testcross can be used to determine whether an individual is homozygous or heterozygous.
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A、4
B、8
C、16
D、32
更多“A testcross can be used to det…”相关的问题
第1题
An individual heterozygous with four different genes can produce how many genetically different gametes?
第2题
Dear Sirs,
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I am writing to your office to attempt to determine why I have encouraged so many obstacles to receiving my proper monthly social allotment.【1】The trouble occurred ten months ago and has actually gotten worse, making extremely difficult for me to meet normal financial obligations.【2】The first problem which I had to deal was simply getting a monthly check from you, without having to wait for four or five extra weeks for it. Then two of the checks that have arrived【3】made out for the wrong amount, giving me fifty dollars fewer than I should have received.【4】Another check was mailed to me at an address, which I moved more than two years ago.【5】My letter of inquiry, which I sent to the Los Angeles Office of the Social Security administration, never brought the answer, and when I finally telephoned them I was able to talk with an arrogant clerk【6】from the tone of his voice I could tell that he didn't want to be bothered with me. The final blow is a letter received from your office yesterady in which you state that【7】my allotment is being discontinued, your records indicated that I am legally dead.
Apart from this letter of protest I have at least one other recourse:【8】filing suit against the Social Security Administration, that I would prefer not to have to do.【9】Howevers I am asking you to take whatever steps are necessary to ensure that【10】from now on I receive my social security benefits with further obstacles. This letter also testifies that I'm indeed not dead, legally or otherwise.
Sincerely yours,
Thelma Spencer
(41)
第3题
How to Determine a Topic for Research
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Because you are going to put a lot of your time and energy into your research project(项目),the topic is especially important. In many instances your instructor may give a specific(特殊的)topic. If this is done, you have little choice, but most instructors will permit or even welcome a slightly changed focus(中心)in a topic if it is supported by good thinking.
In some of your classes, the instructor may present a suggested list of several topics from which you are to make a choice. If this is done, do not simply select the first idea that attracts your attention. It may be one with which you will soon become bored, or it may be one on which you would have difficulty finding all the necessary information. Looking at the topics, try to consider how you might go about developing each of them. When you find out what seems especially interesting and worthwhile(值得骄傲的),do a bit checking in the library to see if you can get the basic resources you will need.
Choosing a good research topic does not necessarily mean finding something that has a lot written about it. Many times you will have to research around a topic in order to find out the most useful information. Exciting and original topics often come to mind by combining two completely different interests. Let us say that you are interested in child psychology(心理学的)and in sports. Perhaps you can combine these into a study of the effect that is watching(可得到的)on the subject, you can research the topic individually and, by putting your information together, then draw a conclusion.
Choosing a topic for research is important in that you will put a great deal of time and energy into it.
A．Right
B．Wrong
C．Not mentioned
第4题
An individual had three pairs of heterozygous genes, after selfing 5 generations, the homozygosity of its offspring population is
A、90.91％
B、87.55%
C、93.75％
D、51.3%
第5题
Businesses large and【C1】______,now realize that physical work space influences employee behaviour.【C2】______, businesses are redesigning their buildings and offices with the intent of offering their employees better working environment. As firms 【C3】______ their offices, they focus on three main factors that have a strong impact【C4】______ employee behaviour: how much space employees have, how the space is arranged, and how much【C5】______ employees have.
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Historically, the amount of space an employee had was【C6】______ related to his or her position. The higher an individual was in an organization,【C7】______ the office he or she typically got. That,【C8】______, no longer seems to be true. As organizations seek to develop more equality, the trends have been toward reducing space【C9】______ to specific employees, and making more space【C10】______ for groups or teams to meet in.
According to recent【C11】______, the amount of personal office space organizations give to administrative employees has【C12】______by 25 to 50 percent over the past decade. This change is【C13】______ in part to economies. Space costs money【C14】______ reducing space cuts costs. But a lot of this reduction can be【C15】______ to changes in the organizations. As jobs have been redesigned and traditional hierarchies(等级制度)replaced【C16】______ teamwork, the need for large offices has lessened. Today, an increasing number of organizations are changing closed offices to cubicles (小隔间) which are【C17】______ in size.
Research has shown that people are more likely to【C18】______ with those individuals who are physically close to them. Employees' work location,【C19】______, are likely to influence the information【C20】______ they are exposed.
【C1】
A．modern
B．advanced
C．small
D．beneficial
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