These pictures show several examples of genes with interesting functions and depict how genes can give living things many different abilities.

A gene is a segment of DNA that codes for a specific trait, like gender (X and Y chromosomes), hair color, skin color, or whether or not you have dimples. The pictures above give examples of several other interesting traits genes code for.  Parents pass on genes to their offspring; the expression of inherited genes is what causes children to look like their parents. Genes are further grouped into very long DNA molecules called chromosomes, which look like crosses. In the case of humans, we have 46 chromosomes in total- 23 from each parent. An organism's genome is its complete set of chromosomes. All of the information needed for that organism to function and live is completely stored in its genome! Going back to our construction-worker analogy, you now understand why DNA is like a blueprint: It codes for genes and tell an organism what to look like and how to act. (8) For more information on genes, an excellent resource is the following website:

 A karyotype, or representation of all the chromosomes in an organism, of all 23 pairs of chromosomes of a human are shown. The human is a male because he has X and Y chromosomes.

Now, we see that to comprehend an organism's genome, we must first understand its chromosomes, its genes, and at the very basic level- the sequence of DNA. This is why DNA sequencing is so crucial to our understanding of genetics. Now that we have learned about the rudiments of genetics, we will next explore two different processes for preparing DNA which are invaluable and commonly used in DNA sequencing.

<<<Previous                                                                                           Next>>>

This free website was made using Yola.

No HTML skills required. Build your website in minutes.

Go to and sign up today!

Make a free website with Yola