Transcript punnet squares intro

PUNNET SQUARES INTRO
VACHS BIOLOGY
TRANSCRIPTION / TRANSLATION REVIEW
CIRCLE ONE: TRANSCRIPTION HAPPENS …. INSIDE OR OUTSIDE THE
NUCLEUS?
CIRCLE ONE: TRANSLATION HAPPENS … INSIDE OR OUTSIDE THE
NUCLEUS?
TRANSCRIPTION STARTS BY COPYING _________ INTO ____________.
TRANSLATION TURNS _____________ INTO _______________.
DURING TRANSLATION, THE AMINO ACIDS NEEDED TO BUILD PROTEINS
ARE BROUGHT TO RIBOSOMES BY _____________.
DNA IS COPIED AND EVENTUALLY TRANSLATED
INTO PROTEIN…
1. DNA AND THE GENES THEY CONTAIN ARE
INHERITED FROM PARENTS…
HOW CAN WE PREDICT THE TRAITS OF OUR
OFFSPRING (CHILDREN)?
GLOSSARY: GENOTYPE VS PHENOTYPE
GENOTYPE: genetic information
PHENOTYPE: observable traits (things you can see!)
GLOSSARY: ALLELE VS GENE
Gene: a piece of DNA that determines a certain trait.
(example: gene that determines eye color)
Allele: one form of a gene.
(example: allele that codes for brown eyes)
GLOSSARY: ALLELE VS GENE
2. PICK THE GENE AND ALLELE:
HAIR COLOR BLONDE HAIR
CURLY HAIR HAIR TEXTURE
GENES VS ALLELES
The color of your hair is determined by a _________________.
One ____________ of this
gene will cause you to have blonde hair.
The texture of your hair is determined by a _______________. One
____________ of this gene will cause you to have curly hair.
MEIOSIS CONNECTION
3. MEIOSIS CREATES HAPOLID CELLS WHICH HAVE …. HALF OR FULL SET OF
CHROMOSOMES?
23 chromosomes from egg + 23 chromosomes from sperm = 46 chromosomes in typical cell
4. ONE SET OF CHROMOSOMES CARRIES ONE SET OF ALLELES; HALF OF YOUR
GENETIC INFORMATION IS FROM EACH PARENT! uppppppp
TWO PARENTS: ONE WITH BLUE EYES, ONE
WITH BROWN EYES!
A ) What are their phenotypes ?
B ) What are their genotypes ?
TWO PARENTS: ONE WITH BLUE EYES, ONE
WITH BROWN EYES!
`What are their phenotypes?
`What are their genotypes?
`Bb, Bb or BB
GLOSSARY: DOMINANT / RECESSIVE
DOMINANT: allele that is present in phenotype whenever it is
present. (B)
RECESSIVE: allele that is present in phenotype only when there
are two copies of this allele present. (b)
ADD TO YOUR GLOSSARY:
~ HOMOZYGOUS :
~ HETEROZYGOUS :
6. PRACTICE: WHAT IS THE PHENOTYPE OF
EACH COMBINATION?
B = brown eyes
~ BB =
~ Bb =
~ bb =
b = blue eyes
7. CROSSING GENOTYPES
DRAW A “ PUNNETT SQUARE” TO PREDICT THE GENOTYPE OF THE OFFSPRING!
ONE PARENT WITH BLUE EYES (HOMOZYGOUS RECESSIVE) AND ONE PARENT WITH
BROWN EYES (HETEROZYGOUS DOMINANT!)
Parents along either side:
PUNNET WORD PROBLEM!
A heterozygous white rabbit is crossed with a
homozygous black rabbit.
PUNNET PRACTICE!
C: restaurant voices
H: raise your hand, ask
the people at your table!
A: use the punnet square
worksheet to practice !
M: sitting still, raise your
hand if you would like to
get colored pencils
P: finding the genotype,
phenotype and ratio.
S: finishing all the
punnets accurately, and
checking your answers.
ZOMBIE PUNNET PORTRAITS: EXTRA CREDIT!
C: “restaurant voices”
H: raise your hand, ask the people at your table.
A: Following the instructions on in your packet, work independently
to create a genetically accurate family of zombies!
M: stay seated during this activity. You should raise your hand and
ask permission before moving around.
P: working independently on your portraits.
S: Completing all of the steps outlined in the packet carefully and
creatively.