Download Genetics Utah Research

Learning Genetics – The University of Utah - http://learn.genetics.utah.edu/
Click on the box – Tour of the Basics – and complete the following tours and questions
What is DNA?
What is the shape of a DNA molecule?
What letters are allocated to the rungs (bases) of the
DNA molecule and what do they refer to?
What is a Gene?
What instructions do the genes contain?
Approximately how many genes do we have in our
chromosomes?
What is the pairing rule for the DNA bases?
What do the “sentences” of DNA bases make and what
do they do?
What is a Chromosome?
If you pulled one DNA from a single cell how far would it
stretch?
What disorder might occur if the haemoglobin gene is
not normal?
At the bottom of the Tour of the Basics page click on the
link to the Old Tour and click on What is Mitosis and
Meiosis. Look through the tour and answer the following
questions.
1. What is Mitosis?
How is DNA packaged into a chromosome?
2. How many sets of chromosomes does a human
cell have?
How many chromosomes are present in a human cell?
3. What names are given to the cells before and
after division?
What do we call the chromosomes that determine the
sex of a human?
How many chromosomes in mosquitoes, onions and
carp?
4. How many cells are formed when a cell divides
through mitosis?
5. What name is given to cells that only contain one
set of chromosomes?
6. How many cells are formed when a cell divides
through meiosis?
Now try the Build a DNA Molecule activity.
How long would it take you to transcribe the DNA in one human cell?
How many cells does the human body produce each day?