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- In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males ...
- Only about 1 percent of DNA is made up of protein-coding genes; the other 99 percent is noncoding. Noncoding DNA does not provide instructions for making ...
- Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, ...
- Most genes contain the information needed to make functional molecules called proteins. (A few genes produce regulatory molecules that help the cell assemble ...
- Each cell expresses, or turns on, only a fraction of its genes at any given time. The rest of the genes are repressed, or turned off. The process of turning ...
- Epigenetics is the study of how cells control gene activity without changing the DNA sequence."Epi-"means on or above in Greek,and "epigenetic" describes factors ...
- There are two types of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the process of making new ...
- A variety of genes are involved in the control of cell growth and division. The cell replicates itself in an organized, step-by-step fashion known as the ...
- Geneticists use maps to describe the location of a particular gene on a chromosome. One type of map uses the cytogenetic location to describe a gene’s position. ...
- A particular disorder might be described as “running in a family” if more than one person in the family has the condition. Some disorders that affect multiple ...
