Punnett Squares
run a Punnett square for Rr x RR
RR Rr
RR Rr
The Father of Genetics
Who is "Gregor Mendel"
How long was the "DNA string model of science"?
200KM
1 Billion!
Match the letters to the correct pair C, A, T, G
A with T
C with G
Run a Punnett Square for parents who are both "Ww"
Ww ww
Ww Ww
What are the alleles
The different options of a specific gene (R,r)
What did Bill Nye compare our chromosomes to?
46 Books
What are the four chemicals we can use for the Nitrogen bases in DNA
Adenine, Thymine, Cytosine, Guanine
Complete the second half of the DNA base pairs:
G C C G A
CGGCT
For the trait (gene) dealing with earlobes use the alleles E=free e=attached
-Bob has free earlobes and his genotype is Heterozygous
-Sue has attached earlobes and her genotype is Homozygous.
Run a Punnett Square for their baby possibilitys
Ee
Ee / ee
ee ----/-----
Ee / ee
What is a dominant Allele and how do we show this in writing
The trait or allele that always shows up "R"
What did Bill Nye compare genes to?
Chapters in a book
What are the 3 parts to a DNA nucleotide
Phosphate, Sugar, Nitrogen base
Complete the second half of the DNA base pairs:
G A G G T A A C T A
CTCCATTGAT
Eye color: B=brown b=blue
Show both the F1 and F2 generations for two homozygous Parents one = BB and one bb
BB Bb
Bb Bb Bb bb
bb Bb
Bb Bb BB Bb
What does it mean to have a Heterozygous Genotype
The genotype has one dominant and one recessive allele
How many genes do humans have? (how many chapters in the books)
80,000
Who came up with the first correct model of DNA
James Watson and Francis Crick
Complete the second half of the DNA base pairs:
C G G T G C C G C T A A C A A
GCCACGGCGATTGTT
If we run a Punnett square for a set of parents and those parents have 4 babies, Do we know exactly what genotype these babies will be? Why?
Not exactly. This is because the Punnett Square only tells us the chances, not predicting the future.
What is a Phenotype?
The outward expression of a trait in an individual
What the Genotype looks like in "real life"
What caused the turtle to have two heads at the end of Bill Nye
A Genetic Mutation
Who took the first x-ray picture of DNA? and why did she get left out of the Nobel Prize?
Rosalind Franklin. She died of cancer from the exposure to x-ray radiation
DAILY DOUBLE!!!
What is the protein that "reads" the DNA code and makes the other half, after Helicase has "Unzipped" the DNA strand
DNA Polymerase