Transcript 4/20 & 4/21 - 7th Grade Agenda

1/18 & 1/19 - 7th Grade Agenda
Collect HW Genetic Activities Worksheet
Collect Late Science Fair Background
Human Traits
Genetic Traits Activity
Video: Ligers + Hybrid Animals
Pass Back HW & Test & Grade Printout
Text Book Reading: 192 – 198
HW: Reading & Notetaking p. 101 – 104
HW: Signature on Grade Printout
Reminder Procedure, Data Table, Graph & Results due 2/9 & 2/10
(15 Points)
Last Day to Turn in Latework for this Semester 1/20 & 1/21
Reflection
• Prompt: Draw and write 3 features about a
hybrid animal you would like to create.
DNA vs RNA
DNA
• Master Copy
• Two Strands
• Never leave
nucleus
RNA
• Copy
• One Strand
• Leaves the
nucleus
Step 1 in Protein Synthesis
• Messenger RNA
Production
Step 2 in Protein Synthesis
• Messenger RNA
attaches to a
Ribosome
Step 3 in Protein Synthesis
• Transfer RNA
attaches to a
Messenger RNA
Step 4 in Protein Synthesis
• Protein Grows
Mutation
Mutation
• Mutation means
“cha_____”
nge in Latin
• Mutation can cause a
cell to produce an
tein
incorrect pro____
during protein
synthesis.
• As a result, the
organism’s trait, or
type may be
pheno____,
different from what it
normally would have
been.
Hybrid Animals
Horse
Mule
Donkey
• All male and most female
mules are infertile
• More intelligent than a
donkey
• More endurance than a
horse
• Requires less food than a
horse
Ligers = Male Lion + Female Tiger
More Ligers
Tigon = Male Tiger + Female Lion
Zorse = Male Zebra + Female
Horse
Wholphin = Dolphin + False Killer Whale
False Killer Whale
Wholphin
Dolphin
Wolfdog = Wolf + dog
House Cat + African Cat
African Cat
Tangelo = Tangerine + Grape Fruit
Some human traits are
controlled by a single gene that
has more than two alleles
• Blood type is controlled
by three Alleles
• What are the major
human blood types?
• A, B, AB & O
• Which human blood type
is a universal donor?
• Blood Type: O
Many human traits are controlled
by many genes
• Four genes control height in humans
• Skin, eye and hair color are controlled by
multiple genes
What are the Female Sex
Chromosomes?
• XX
What are the Male Sex
Chromosomes?
• XY
• Because there is
some missing genetic
information in the “Y”
chromosomes, Males
are more likely to get
a sex-linked trait
Who determines whether the
child is a boy or a girl ?
• Father
How many pairs of
chromosomes do humans have?
• 23
Scientific Process
•
•
•
•
•
Observe
Pose a Question
Develop a Hypothesis
Predict
Experiment and collect
data
Scientific Inquiry
• Scientific Inquiry
refers to the diverse
ways in which
scientists
inve_______
stigate the
natural world and
pose expl__________
anations
based on the
evidence they gather.
1st Step: Posing Questions
• Scientific Inquiry often
begins with a problem
or question about an
obse_________.
rvation
2nd Step: Hypothesis
• Hypothesis is a
possible expl_______
anations
for a set of
observation or answer
to a scientific question
3rd Step: Design an Experiment
• An experiment in which
only one var______
iable is
manipulated at a time is
called a controlled
experiment
• Why is only one variable
manipulated?
4th Step: Collecting and
Interpreting Data
• Data are the facts,
figures, and other
dence gathered
evi_______
through observations.
• It is usually a data or
a chart
5th Step: Drawing Conclusions
• A conclusion is a
summary of what you
rned from
have lea_____
an experiment.
6th Step: Communicating
• Communicating is
sharing of ideas and
experimental findings
with others through
writing and sp______.
eaking
pH
• pH: means potential of hydrogen (Positive Ion)
–
–
–
–
Scale goes from 0 to 14
0: Very acidic (hydrochloric acid)
7: Neutral (Water)
14: Very basic or alkaline (Drain Cleaner)
What are properties of an acid?
• It tastes sour
• It reacts with metals
and carbonates
• It turns blue litmus
red.
What are some common use of
acids ?
What are properties of a bases?
•
•
•
•
It tastes bitter
Slippery feel
Reacts with acids
Turns red litmus blue
What are some common use of
bases ?