Intro to BIO- Hoptak- Exam 2 Study Guide Highlight = Important Principle Highlight = Important Concept Highlight = Key Term
- Discovered by Watson & Crick in 1953
- Rosalind Watson not given credit
- Double helix: nucleic acid & nucleotides
- DNA v. RNA
- RNA uses uracil instead of thymine
- Differ with bases but primarily with sugar
- *G w/ C ; A w/ U
- Transcription to translation to protein
- Bases (4)
- Single ring: Thymine (T), Cytosine ( C )
- Double ring: Adenine (A), Guanine (G)
- Make up the steps of ladder
- 1 side of ladder pairs with other side: A w/ T ; C w/ G
- *Exam question* Fill in corresponding base pairs for DNA sequence
- A T C G T T A C C G
- T A G C A A T G G C
- DNA Replication
- Cell divides and makes copy
- Pieces of DNA pull apart like bubbles
- Once open, DNA is like zipper, creating new DNA and adding bases to end up w/ original molecule
- 3 bases that produce 1 amino acid
- Read 3 at a time
- Each living organism on earth uses this code If you want to learn more check out What is the role of older siblings with disabilities?
- Cell Division
- Necessary for all life
- Replace lost/damaged cells
- For growth
- To maintain cell number
- Happens every few days
- Basis of sexual reproduction in mammals
- In reproductive cells it produces the sperm and eggs - *Big function is keeping 23 chromosomes If you want to learn more check out What is lantern?
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- Turner Syndrome
- Can lead to pregnancy trouble
- Missing an X chromosome
- Principles of Fertilization
- Cross fertilize pea plants
- Monohybrid cross found people only differ in 1 part - Dominant Allele v. Recessive allele Don't forget about the age old question of What is the polio virus?
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- Genotype v. Phenotype If you want to learn more check out What is the preliminary hearing?
- Heterozygous v. Homozygous
- Phenotype v. Genotype