Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Genetics Laboratory: DNA, Genes, and Punnet Squares, Assignments of Ecology and Environment

A laboratory assignment for a genetics course. It includes instructions to visit a website and answer questions about dna, genes, chromosomes, proteins, and heredity. Additionally, students are asked to make predictions using punnet squares and pennies (or chips) to simulate crosses and compare the predicted and actual ratios.

Typology: Assignments

Pre 2010

Uploaded on 08/09/2009

koofers-user-3rp-1
koofers-user-3rp-1 🇺🇸

5

(1)

10 documents

1 / 6

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Laboratory 10
Basic Genetics
Part 1
(Take Home Assignment)
Visit the following Site Location:
http://gslc.genetics.utah.edu/
Click on the link that says "The Basics and Beyond" then ---Click on the link that says
"Tour the Basics"
Answer the following questions:
1. What is DNA? _____________________________________________________
2. What does DNA stand for?
____________________________________________________
3. Why is DNA called a blueprint?
____________________________________________________
4. The "twisted ladder" shape of the DNA molecule is called a
__________________________________
5. Name the four bases found in a DNA molecule.
_________________________________________
________________________________________________________________________
______
6. A DNA strand is made of ______________ which make up _______________ which
make up sentences.
7. These "sentences" are called _____________________________________
What is a Gene? Hint - Look at the navigation bar at the top, you'll need to click on
"What is a Gene" to continue.
8. What is a gene?
__________________________________________________________________
9. Blood cells use a protein called _______________________ to capture and carry
oxygen.
10. When a gene is changed, it is said to be ________________________________
11. A mutation in the hemoglobin gene cause what disorder?
_______________________________
pf3
pf4
pf5

Partial preview of the text

Download Genetics Laboratory: DNA, Genes, and Punnet Squares and more Assignments Ecology and Environment in PDF only on Docsity!

Laboratory 10

Basic Genetics

Part 1 (Take Home Assignment) Visit the following Site Location: http://gslc.genetics.utah.edu/ Click on the link that says "The Basics and Beyond" then ---Click on the link that says "Tour the Basics" Answer the following questions:

  1. What is DNA? _____________________________________________________
  2. What does DNA stand for?

  1. Why is DNA called a blueprint?

  1. The "twisted ladder" shape of the DNA molecule is called a

  1. Name the four bases found in a DNA molecule.



  1. A DNA strand is made of ______________ which make up _______________ which make up sentences.
  2. These "sentences" are called _____________________________________ What is a Gene? Hint - Look at the navigation bar at the top, you'll need to click on "What is a Gene" to continue.
  3. What is a gene?

  1. Blood cells use a protein called _______________________ to capture and carry oxygen.
  2. When a gene is changed, it is said to be ________________________________
  3. A mutation in the hemoglobin gene cause what disorder?

What is a Chromosome?

  1. If you stretched the DNA from a cell out, how long would it be?

  1. How many chromosomes are in a human cell? ___________ in a mosquito? ________ a carp? _________ What is a protein?
  2. How is a protein like a car engine? ____________________________
  3. Receptor proteins are responsible for picking up ___________________
  4. Each gene in DNA encodes information on how to make a

  1. Once in the cytoplasm, the _______________ reads the message. What is Heredity?
  2. The passing of traits from parents to a child is the basis of _____________________
  3. Every child receives __________ of its chromosomes from his mother, and _______from his father.
  4. When a sperm and egg join, they create a single cell called a

  1. Each child inherits a ______________ set of chromosomes

Procedure: To determine Actual Ratios, you will flip your coins 100 times, recording in the table below how often each combination came up. (Use tally marks to record your data then summarize as a number) Gene Combination (Genotype) Tally Total TT Tt tt Phenotypes Total Short toe (add TT + Tt ) Long Toe Since you flipped one hundred times, your totals above represent a Percentage. Your proportions from the Punnet Square in your prediction can also represent a Percentage. 1/4 = 25 % 2/4 = 50% 3/4= 75% 4/4 = 100% Now compare your predicted ratios to your actual Ratios in the chart below. Predicted (from the Square your did) Actual (from the flips) TT Tt tt Short Toe Long Toe Would you consider the predicted values to be the same, close to the same, or not at all the same?

Second You will repeat the procedure for parents that are Tt and t t

  1. First make your predictions by setting up a Punnet square for the parents. (This one is not set up for you) How many are predicted to be: Short Toe ______ Long Toe ______ **Replace one of your pennies (chips) with a t t penny Perform the flips with your new set of parents. Record your data in the table below Tally Total Tt tt What percentage of your offspring are Tt _____ What percentage are short toes

What percentage of your offspring are tt _____ What percentage are long toes


Compare the Predicted Ratios of the cross to the Actual Ratios. Predicted (from Square) Actual (from flips) Short Toe Long Toe