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6th Grade Science / Lesson 9 - Where are the Factors?

Where are the Factors
What will we be learning today?


  • In this lesson, we are going to learn all about where are factors.


So Where Are the Factors?


  • Gregor Mendel realized that all organisms get two copies of each factor-one factor from each parent. Today scientists call these factors genes. A gene is the portion of a chromosome that controls a particular trait. Genes contain the information needed for cells to function. Genes are arranged along the length of a chromosome.


In Twos


  • Organisms have two copies of each gene for a given trait. They get one copy from each parent. For example, the length of your eyelashes was determined by one "eyelash" gene you got from your mother and one "eyelash" gene you got from your father. Both genes are located in the same place on a chromosome.


How the Code Works


  • How do genes control traits? Genes are portions of a long, complex molecule called deoxyribonucleic acid, or DNA. DNA contains the codes that tell each cell how to operate. Each gene on a chromosome is a short section of the long DNA molecule that makes up the chromosome. The genetic characteristics of every living organism are contained in that organism's DNA. The DNA in each cell of a given organism is the same. The DNA of every organism is different from that of every other organism.


The codes that the DNA molecule contains are related to the molecule's shape and structure. The shape looks like a spiral staircase. The steps of the staircase are made of chemical compounds, called bases, that fit together like the pieces in a puzzle.


Let's Review What We Learned Today!


  • Now go watch the movie

  • Then complete your worksheet!