7.14AC: Heredity Organisms and environments Using the Web Surfing Science! websites your teacher has assigned to you, complete the following online treasure hunt. Part I: What is Heredity? Part II: Probability of Inheritance Part III: DNA from the Beginning: Classical GeneCcs Part I: What is Heredity? Click on the “What is Heredity?” tour of the basics and answer the following ques?ons. 1. The passing of ______________________________ from parent to child is the basis of heredity. 2. Where are the instruc?ons that define our traits? ______________________________________________________________________________ 3. What exactly is a trait? Tour the “What is a Trait?” basics, and then explain what a trait is in your own words. ______________________________________________________________________________ ______________________________________________________________________________ 4. What is an allele, and how many do we have for each trait? ______________________________________________________________________________ 5. What do homozygous and heterozygous mean? ______________________________________________________________________________ 6. If someone has a dominant allele and a recessive allele, what will happen? ______________________________________________________________________________ 7. How are traits inherited? ______________________________________________________________________________ 8. Why don’t all children of a family look just a like? Click on “Observable Traits.” Which of these traits do you have? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 1 7.14AC: Heredity Organisms and environments Part II: Probability of Inheritance 1. What are two uses for being able to predict what traits will be inherited? _______________________________________________________________________________ _______________________________________________________________________________ 2. Given the genotype of the parent, a ____________________________ can be used to predict the possible genotypes of the offspring. 3. The genotype of a _____________________________ goes along the top and le\ side of a chart. 4. The possible offspring genotype will be found in the _________________________ of the square. Part III: DNA from the Beginning: Classical GeneCcs Read through the 14 pages in the Classical Gene?cs sec?on, and then answer the ques?ons below. 1. Gregor Mendel iden?fied seven dis?nguishable individual ______________________________ . Each one, he discovered, had two different forms of expression. 2. Mendel reasoned that the yellow trait was _____________________________________ and the green trait was ____________________________________. 1. Studies done by Thomas Hunt Morgan show that in fruit flies, the gene for eye color must be physically carried on the _____________________________. 2
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