更多"We inherit our DNA from our parents"的相关试题:
[填空题]We inherit our DNA from our parents. DNA is shuffled, recombined and{{U}} (36) {{/U}}from one generation to another. Each individual on this earth received 23{{U}} (37) {{/U}}of chromosomes from their parents (23 from dad and 23 from mom). Because DNA is{{U}} (38) {{/U}}to a certain degree from one generation to the next, it is possible to{{U}} (39) {{/U}}family lines by{{U}} (40) {{/U}} specific markers.
The{{U}} (41) {{/U}}of the Earth are more closely related than what it is generally thought. Today there are 6{{U}} (42) {{/U}}people living on this planet. If we do some math, and we consider a generation to be about 25 years, 30 generations ago, every individual living today would have over 1 billion{{U}} (43) {{/U}}ancestors. The estimated world population for the year 1250 AD was 400 million people.
This means that the number of actual ancestors for each individual is smaller than the number of possible ancestors and{{U}} (44) {{/U}}.These common ancesto
[单项选择]In the next century we’ll be able to alter our DNA radically, encoding our visions and vanities while concocting new life-forms. When Dr. Frankenstein made his monster, he wrestled with the moral issue of whether he should allow it to reproduce, "Had I the right, for my own benefit, to inflict the curse upon everlasting generations" Will such questions require us to develop new moral philosophies
Probably not. Instead, we’ll reach again for a time-tested moral concept, one sometimes called the Golden Rule and which Kant, the millennium’s most prudent moralist, conjured up into a categorical imperative: Do unto others as you would have them do unto you; treat each person as an individual rather than as a means to some end.
Under this moral precept we should recoil at human cloning, because it inevitably entails using humans as means to other humans’ ends and valuing them as copies of others we loved or as collections of body parts, not as individuals in their own right. We sho
A. to give an episode of the DNA technological breakthroughs.
B. to highlight the inevitability of a means to some evil ends.
C. to show how he created a new form of life a thousand years ago.
D. to introduce the topic of moral philosophies concerning biotechnology.
