Genetics Internet Search
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Part 1:  Introduction to genetic sex linked traits

1.    Colorblindness
    a.    What is colorblindness?
    b.    What is the most common type of color blindness?
    c.    What percentage of European males and colorblind?_____________Females?__________

2. Hemophilia click on the following topics to answer the questions:
    a.    Incidence:  How many males are born with hemophilia?_____________
    b.    Symptoms:  What is hemophilia?

    c.    Facts and Theories:    What disease did many hemophiliacs contract in the 1980's because be hadn't yet developed a way to test blood plasma?________________
    d.    Treatment:    How can hemophilia be treated?

    e.    Cause: What mutates to cause hemophilia?

Part 2:  Genes and DNA

1.    Genes:
        Genes are stretches of___________________and have assigned places on the cell's                                    .

2.    DNA:
    a.    What does DNA stand for?
    b.    What are the names of the four bases that make up strands of DNA?

    c.    Draw a picture of a DNA strand with labels.
 
 
 
 
 
 

3.    Click on the Human Genome Project:
    a.    There are_________________gene pairs and______________________DNA base pairs.
    b.    What  species will the Human Genome Project finish mapping the DNA of in 2003?
    c.    What benefit will there be if we learn about all the DNA in a human being?

Part 3:  Cloning:

    a.    What was the first known breeding of animals? (when, with what, why)
 

    b.    What is genetic engineering?
    c.    What was the earliest form of genetic engineering? (where, what, why)

Go to the Test for Colorblindness
Go through the series of pictures and tell what each number is in order from left to right:

Part 4:  Dominant vs. Recessive Traits

Go to Determining Your Genes
    a.    You have__________genes for every trait.   You get one from your_____________and one from your_______________.
    b.__________________genes are represented by a capital letter and_____________genes are lower case letters.

Directions:    Go down the list on the web site and circle the gene you possess for each of the following traits.

    a.    Tongue Rolling
    b.    Attached Earlobes
    c.    Interlocking Fingers
    d.    Dimples:
    e.    Sex:
    f.    Bent Little Finger
    g.    Double Jointed Thumb
    h.    Freckles

(skip PTC taste and Sodium Benzoate Taste)

    i.    Widow's Peak

Count up your answers:
    a.    I have_______________Dominant traits
    b.     I have_______________Recessive traits

    c.    Compare your answers to what you know about your parents.  Do you think you got more traits from your mother or father?  Explain why.