Warm-Up (1/27) Answer the following questions, and explain in a complete sentence why each answer is correct. Name Date Period If a paramecium (a one-celled.

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Presentation transcript:

Warm-Up (1/27) Answer the following questions, and explain in a complete sentence why each answer is correct. Name Date Period If a paramecium (a one-celled eukaryotic organism) is placed in a hypertonic environment, which of the following will occur? Water will diffuse into the paramecium. Water will diffuse out of the paramecium. Salt will be pumped out of the paramecium by the vacuole. Salt will be pumped into the paramecium by the vacuole. Draw a Punnett square showing a cross between a heterozygous person and a homozygous person for the A gene (“A” is the dominant allele; “a” is the recessive allele). What fraction of the offspring will show the dominant phenotype?

Mutations A DNA sequence: nucleus TAC CAC GTG GAC TGA GGA CTC CTC TTC Transcribe the mRNA sequence: TAC CAC GTG GAC TGA GGA CTC CTC TTC AUG GUG CAC CUG ACU CCU GAG GAG AAG

Mutations nucleus TAC CAC GTG GAC TGA GGA CTC CTC TTC AUG GUG CAC CUG ACU CCU GAG GAG AAG Translate the mRNA sequence into an protein: AUG GUG CAC CUG ACU CCU GAG GAG AAG Met Val His Leu Thr Pro Glu Glu Lys

Mutations A mutation is a change in DNA. TAC CAC GTG GAC TGA GGA CAC CTC TTC Transcribe the new mRNA. AUG GUG CAC CUG ACU CCU GUG GAG AAG Translate the new protein. Met Val His Leu Thr Pro Val Glu Lys

Mutations A mutation is a change in DNA. This changes the mRNA, which changes the protein. Normal Hemoglobin Protein Mutated Hemoglobin Protein Hemoglobin Video 1st 2 minutes

What do you see?

*you don’t have to write this down! Diseases that can occur with by a substitution or point mutation. Color blindness Cystic Fibrosis Cancer Tay-Sachs disease Sickle-cell anemia *you don’t have to write this down!

Mutations A mutation is a change in DNA. This changes the mRNA, which changes the protein. Substitution – replacing one nucleotide for another. Insertion – adding a nucleotide. Deletion – removing a nucleotide. old: ATG GAG GGA new: ATC GAG GGA old: ATG GAG GGA new: ATG CGA GGG A old: ATG GAG GGA new: ATG AGG GA

Carousel Activity 6 for a 70% 12 for a 100%

Closure Answer the following question in a complete sentence: Name Date Period If a DNA sequence is changed from TAC to TGC, how will the resulting amino acid change? Scale from 1-10