What is DNA? A. It is a kind of gene、 B. It is a substance that makes up genes、 C. It is the basic unit of heredity、 D. It is a measure to protect crime、 E. 细节理解题。根据文章第二段第一句可知。 相关知识点: 试题来源: 解析 答案与解析: ...
Your genes come from your parents,and they decide everything about you such as your hair color,your eye color,your weight,your height,and so on.Genes are still a bit of a mystery(神秘) to scientists,but they' re learning new things about them all the time. ...
It is because of thesmall things called “genes(基因)” in our body. In 1953,two scientists, Watson and Crick, found out that those smallparts are really messages. They're written in the DNA witha special language.In 1961, two other scientists found the first “ wordthat they could ...
The very long strand of DNA which further contains many genes (hundreds to thousands) makes up a chromosome. The genes are arranged in a particular sequence and have a particular location on the chromosome (called its locus). In addition to DNA, chromosomes also contain man...
【题目】1) Describe about genes.2) What do you understand by acquired characters?Does environment have any role for these characters?3) What is genetic variation?Explain the mechanism behind this.4) List some human characteristics that areaffected by the environment,and explain how they might be...
This chapter provides an overview of genes and their working. One of the main factors in evolution is that the genes themselves change by mutation. The actual heredity carrying parts of the chromosome are made from a substance known as DNA, an abbreviation for deoxyribose nucleic acid. In DNA...
We found DNA sequence motifs that are overrepresented in the promoter regions of the OR genes. Most motifs resemble O/E-like sites and are preferentially... JS Michaloski,PAF Galante,B Malnic - 《Genome Research》 被引量: 83发表: 2006年 All motifs are NOT created equal: structural propert...
在“基因与基因病”一节所引用的“What exactly is a gene”这一科普动画中,描述不够准确的有( )。A.A. A gene is a special stretch of DNA that codes for something.B.A. Genes make proteins.C.A. Each one of our cells contains 46 strands of DNA.D.A. Some genes
time.In I860,Mr Mendel discovered why we look the same as other people in our family.It is because of small things called"genes"(基因) in our body.In 1953,two scientists,Watson and Crick,found out that those small parts are really messages.They're written in the DNA with a special ...
Genes are found in chromosomes which are found in the nucleus of cells. Chromosomes are coiled up lengths of DNA each carrying lots of genes. Remember – chromosomes are made of DNA and genes are short sections of DNA. How many chromosomes do humans have? Human cells have 46 chromosomes, ...