Genetics - Form IV
When you click Submit (at the bottom of this web page) it will save your
work on the server for me.
DO NOT Click submit more than once!
TAB OR USE THE MOUSE Between the
You are encouraged to work in small groups (pairs or
threes). You will only have to submit one paper per group (with all the names!)
In the computer log on as “River” password: “Deep” in the
Domain “this computer”
You will want to keep this window open while you work on
Riverdeep. To do this you should open Riverdeep in a new window.
Click on “Start” then “Programs” then “Riverdeep Logal
Express” then “Riverdeep Logal Express”
Click on “High School Science Gateways” then “Biology” then
“Principles of Genetics”
Start with “Phenotype and Genotype Ratios in Single
Trait Inheritance” and read and do
everything on the site. However while you need to fill in the tables on the site
to figure things out, you do not have to answer the questions in the boxes on
the site. Below you will find boxes with some of their questions, and some of my
own. You will be graded on these answers.
Answer the questions as best you can. The boxes will expand as you type if you need more space.
(Don't worry if it is a one word answer. The box size is standard.)
Read Modules 5 in "Classical Genetics" at
DNA From the Beginning
Question 1: Fill in the table on page 3 of 15 and then on 4 of 15.
From page 5 of 15,
what is the difference in total number of offspring between the two phenotypes?
What is the ratio of straight ears to floppy ears?
Enter the results
of the simulation in the box on page 6. From page 7 of 15, what is the
ratio of straight ears to floppy ears?
Question 3-5: Fill in the Punnett Square for the F2 cross below:
For each of the empty boxes enter the Genotype, AND the
phenotype AND if it is heterozygous or homozygous. I have done the first one.
Remember, the boxes will expand as you type if you need more space.
Question 6: How many different genotypes are there in the Punnett
square for questions 3-5?
Question 7: How many different
phenotypes are there in the Punnett square for questions 3-5?
Question 8: For humans having an
earlobe attached is recessive. What is the genotype of a person with earlobes
attached (use the letter "E/e" for the trait)?
Question 9: For humans having an
earlobe attached is recessive. What is/are the genotype(s) of a person with
unattached or free earlobes (use the letter "E/e" for the trait)?