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Genes and Mitosis I. Genes A. Genes are sections of DNA that code for that usually has one or more versions, or Some genes determine traits in an organism B. Trait is a physical characteristic in an organism that usually has more than one variation ex: Trait – Alleles – . Talk with your partner come up with additional traits and alleles and list them here C. Each organism has two alleles for every trait in their body. -One from the chromosomes* inherited from -One from the chromosomes inherited from -These pair of chromosomes are called *A chromosome is DNA that has been wound up into a rodlike shape *This is why organisms appear to be a physical “blend” of their parents. A pair of homologous chromosomes in sweet peas containing a gene for the trait of flower color: Chromosome inherited from the mother Chromosome inherited from the father Draw and color code 3 sets of homologous chromosomes that carry the alleles of the traits you just came up with (leave lots of space in between each chromosome). Label each chromosome with an allele. Mitosis I. Mitosis is the process of the cycle cycle where the cell divides A. When cells divide, they must make copies of the (wound up DNA) so that each cell receives a complete set of chromosomes *If the cell does not receive a complete set the cell is mutated and may not function Chromosomes are long sections of DNA wound around proteins. -Most of the time DNA is not wound into a chromosomes, . -When the cell is ready to replicate, winding the DNA helps keep it easily manageable and less likely to be damaged. Copy and paste your chromosome slide and then duplicate your chromosomes, making sure to label each allele as you copy them. Draw arrows to opposite sides of the page to show where each chromosome would go during cell replication.