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MERLOT II


    

Learning Exercise


Material: Genetics Tutorial
Submitted by: Navjot Gill on May 14, 2007
Date Last Modified: May 14, 2007
Title: Genetics Tutorial
Description: Students will go through the animations of the website and answer questions.
Type of Task: Individual, Supervised
Time Required 2 periods
Topics: Genetics
Course: 7th Grade Life Science
Audience: Middle School
Categories:
Prerequisites Skills: Students need to understand the basics of genetics before going through this tutorial.
Learning Objectives: 1. Students understand that everything living thing is made from cells. 2. Students can explain that our traits are determined by our genes. 3. Students understand that DNA is passed on from one generation to the next. 4. Students understand that there are dominant and recessive genes. 5. Students are able to complete a Punnett Square and predict genotypes and phenotypes of the next generation.
Text of Learning Exercise: Directions: 1. Find the Internet Explorer icon on your screen and double click on it 2. When the internet has come up on the screen, type in the following address in the address section on top: http://www.dnaftb.org/dnaftb/ 3. Find the word enter and click on it 4. Look all the way to the right of the screen and find where it says #1 Children Resemble Their Parents and click on it 5. Read the information provided, then click on animation at the bottom of the screen 6. Read through the tutorial and find the information needed to answer your questions 7. To go the next screen of the tutorial click on the right arrow 8. You are going to go through tutorials #1-9,13,19 9. As you go through the tutorial, look for answers to your questions. 10. Good Luck! 1. Children Resemble Their Parents 1. Why did Gregor Mendel work with pea plants and not anything other kind of living thing? 2. How did Mendel cross-fertilize the flowers? 2. Genes Come in Pairs 1. What is phenotype? 2. List the traits of the peas. 3. What is genotype? 4. How many pea plant varieties did Mendel start with? 3. Genes Don’t Blend 1. Explain in detail the main point behind this particular tutorial. 4. Some Genes are Dominant 1. Why did the second generation have some green peas in it? 2. Write down all the genotypes of the 2nd generation of pea plants, (when Yy and Yy were crossed) 5. Genetic Inheritance Follows Rules 1. What does the law of segregation state? 2. Who invented the Punnet Square? 3. Click on “problem” at the bottom of the screen and work it out below. 6. Genes are Real Things 1. What did the three scientists studying heredity find surprising? 2. What was the name of the first scientist to see cells under a microscope and what type of cells was he looking at? 3. Do all species have the same amount of chromosomes in the nucleus of their cells? 7. All Cells Arise From Pre-Existing Cells 1. Explain Walther Flemming’s experiments step by step. 2. What is the end result of mitosis? 3. What saying did Walther Flemming use at the end of the tutorial about cells? 8. Sex Cells have One Set of Chromosomes, and Body Cells Have Two 1. What happens during sexual reproduction? 2. Summarize what happens during meiosis (NOT MITOSIS)? 9. Specialized Chromosomes Determine Gender 1. What two types of chromosomes found only in male sperm determine the sex or gender of the child? 2. Who is responsible for the sex of the child? 3. What genetic combination results in a female? Male? 13. Mendelian Laws Apply to Humans 1. What family does this tutorial focus on? 2. What are pedigrees used for? 3. What genetic disease did this family carry? 4. How many of the children ended up with hemophilia? 5. Which people in the family can get this disease? 6. A trait, in this case a disease, that only affects a certain sex, but can be carried by the other sex is called what? 7. For eye color, what is the dominant trait? 19. The DNA Model is Shaped Like a Twisted Ladder 1. What is the “cork screw shape” in protein called? 2. Describe, very briefly, some of the things Watson and Crick did in order to figure out the structure of DNA? Directions: 1. Find the Internet Explorer icon on your screen and double click on it 2. When the internet has come up on the screen, type in the following address in the address section on top: http://www.dnaftb.org/dnaftb/ 3. Find the word enter and click on it 4. Look all the way to the right of the screen and find where it says #1 Children Resemble Their Parents and click on it 5. Read the information provided, then click on animation at the bottom of the screen 6. Read through the tutorial and find the information needed to answer your questions 7. To go the next screen of the tutorial click on the right arrow 8. You are going to go through tutorials #1-9,13,19 9. As you go through the tutorial, look for answers to your questions. 10. Good Luck! 1. Children Resemble Their Parents 1. Why did Gregor Mendel work with pea plants and not anything other kind of living thing? 2. How did Mendel cross-fertilize the flowers? 2. Genes Come in Pairs 1. What is phenotype? 2. List the traits of the peas. 3. What is genotype? 4. How many pea plant varieties did Mendel start with? 3. Genes Don’t Blend 1. Explain in detail the main point behind this particular tutorial. 4. Some Genes are Dominant 1. Why did the second generation have some green peas in it? 2. Write down all the genotypes of the 2nd generation of pea plants, (when Yy and Yy were crossed) 5. Genetic Inheritance Follows Rules 1. What does the law of segregation state? 2. Who invented the Punnet Square? 3. Click on “problem” at the bottom of the screen and work it out below. 6. Genes are Real Things 1. What did the three scientists studying heredity find surprising? 2. What was the name of the first scientist to see cells under a microscope and what type of cells was he looking at? 3. Do all species have the same amount of chromosomes in the nucleus of their cells? 7. All Cells Arise From Pre-Existing Cells 1. Explain Walther Flemming’s experiments step by step. 2. What is the end result of mitosis? 3. What saying did Walther Flemming use at the end of the tutorial about cells? 8. Sex Cells have One Set of Chromosomes, and Body Cells Have Two 1. What happens during sexual reproduction? 2. Summarize what happens during meiosis (NOT MITOSIS)? 9. Specialized Chromosomes Determine Gender 1. What two types of chromosomes found only in male sperm determine the sex or gender of the child? 2. Who is responsible for the sex of the child? 3. What genetic combination results in a female? Male? 13. Mendelian Laws Apply to Humans 1. What family does this tutorial focus on? 2. What are pedigrees used for? 3. What genetic disease did this family carry? 4. How many of the children ended up with hemophilia? 5. Which people in the family can get this disease? 6. A trait, in this case a disease, that only affects a certain sex, but can be carried by the other sex is called what? 7. For eye color, what is the dominant trait? 19. The DNA Model is Shaped Like a Twisted Ladder 1. What is the “cork screw shape” in protein called? 2. Describe, very briefly, some of the things Watson and Crick did in order to figure out the structure of DNA?
Assessment: Students will be assessed after the whole genetics unit is complete. This assignment is one component of the unit and is used as to reinforce the information.
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