So, the big idea for today is that mitosis will create cells thats have a complete of DNA or are . We create an exact___ of the cell and this is how cells in the___, called cells, reproduce allowing us to grow and heal. Meiosis will create ___ cells that have half the normal amount of DNA or are ___. Only organisms that go through ___ reproduction will go through meiosis because it creates ___ and ___, or the gametes. The gametes only have ___ the DNA so that when they come together to make a ___, the baby will have a complete set of DNA

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.

d. organisms have cells with different shapes and functions.