This is a fun and creative activity to tie all of the following concepts together into one lesson:DNA sequencing & transcription,mRNA translation,amino acid codons & proteins,genotype,phenotype,recessive & dominant alleles & traits.
Students will help solve a crime based on DNA evidence left on a lollipop at the crime scene.There are 3 versions of the same scenario that will identify 3 different criminals so you can use them for 3 classes – this avoids having the kids tell the next class who the suspect is ;).Each student will receive one of the 4 DNA samples – you can have students work individually,or have a group of students work on suspect 1,another on suspect 2,etc.(Sorry – I do not have an answer key to post)
- Step 1– students will transcribe the DNA sequences into mRNA sequences
- Step 2– using the Amino Acid codon wheel,they will determine the amino acid for each codon
- Step 3– using the chart,they will find protein using the sequence of amino acids
- Step 4– using the proteins,they will determine the phenotype
- Step 5– using the phenotypes,they will determine the genotype(s)
- Step 6– is their suspect the criminal?
- Step 7 –they will draw a mug shot of their suspect using the phenotypes they decoded
This lesson was modified from the one found on Biology Corner: https://www.biologycorner.com/worksheets/DNA_snorks.html