Genetics(遗传学) obviously play a major role—no two faces share the same DN A. But even in identical twins, there are still small differences in their appearances. So what is it that makes each face different? The answer lies in a small piece of your DNA called a "gene enhancer", ...
As the probability that DZT share a genotype is only one fourth; those with CBC may show unusual genotype as if they have three or four different alleles at a certain locus. If this occurs at the ABO locus, such twins have unusual ABO blood groups, as seen in case 6. Thus, CBC may...
【小题2】Why did the scientists choose identical twins as their test subjects? A.They looks very much alike. B.They have shared experiences. C.They have similar personalities. D.They share basically the same DNA.【小题3】What did the author try to prove by mentioning the studies in Para...
Using twins allows us to estimate the proportion of differences that can be explained by genetic factors. Identical twins share 100% of their genes, whilenon-identical twinsshare on average 50% of the genes that differ between people, just like other siblings. If identical twins are more alike...
In effect, two individuals with identical DNA can and do manifest both similar and different lives…In a chapter titled“Why Aren’t Identical Twins Actually Identical?”author Nessa Carey states that“…The differences between identical twins have certainly captured the imaginations of creative people...
Do twins have the same fingerprints? Even identical twins – who have the same DNA sequence and tend to share a very similar appearance –have slightly different fingerprints. That's because fingerprints are influenced by both genetic and environmental factors during development in the womb. .....
aThat Lily and Gillian seem so similar, despite being raised in different families, underscores the genetic heritage that identical twins share. But for two brothers in Maryland, the situation is just the reverse. Despite being raised in the same family, these identical twins couldn't seem more...
Do twins have the same fingerprints? Even identical twins – who have the same DNA sequence and tend to share a very similar appearance –have slightly different fingerprints. That's because fingerprints are influenced by both genetic and environmental factors during development in the womb. .....
Because the environment in the womb also has an effect, even the prints of identical twins are slightly different. While it's possible that two people could be found who had identical fingerprints, the chances of this happening are so small as to be virtually negligible. In a criminal case...
Chapter 8/ Lesson 2 163K Learn about the structure and composition of chromosomes. Explore how DNA and chromatin are related to chromosomes. Discover where in the cell chromatin is found. Explore our homework questions and answers library