Transcript Inherited Traits - STEMTeachersNowPDProject

Inherited Traits
5th Grade Science
Ms. Felisha Harper
Marshall Elementary School
Objectives
• Traits are observable characteristics
that are passed down from parent to
child.
• An individual will have many traits they
share in common with others.
• An individual’s overall combination of
traits makes them unique.
• Some traits are more common in a
population than others.
What are some inherited traits?
• Inherited traits are things that are passed
on from parents to offspring.
• A tiger has stripes.
• A giraffe has a long neck.
• An elephant has a trunk.
• A snake has no legs.
• A plant has flowers.
What are some inherited traits?
• Some people have a genetic trait
that creates indentations on their
cheeks called dimples.
• These two images show the
difference between a regular thumb
and a “Hitchhiker’s thumb.” Because
of a genetic difference, one can bend
farther backwards.
• Tongue rolling is
a genetic trait
certain people
have that allows
them to curl their
tongue.
• Some people have toes that decrease
(get smaller) in size from the big toe
to the small one.
• Others have a second toe that is
longer than their big toe.
• Are you right or left thumbed?
Put your hands together,
interlocking your fingers. Which
thumb is on top?
• Are your earlobes attached or
unattached? A person with attached
ear lobes will have the lowest point of
the ear lobe attached to the face.
Widow’s Peak
A widow's peak is a distinct point in the hairline in
the center of the forehead; it is a dominant
inherited trait, and typically does not skip
generations. There are varying degrees of the
peak. People who don't have a widow's peak
have a hairline that is truly straight across,
almost like following a circle or almost like a
curved line.
Widow’s Peak
• Can you make a Vulcan
hand sign?
• Which of the following is an inherited trait?
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–
–
–
–
–
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–
Right handedness
Curly hair
Runs fast
Blue eyes
Likes to play baseball
Long fingers
Likes the color red
Chews on a pencil
Long skinny feet
What are some inherited traits?
• Look at the elephants. What
traits do they have in common?
What are some inherited traits?
What are some inherited traits?
•Traits
–Scales
–Fins
–Gils
–Tail
What are some inherited traits?
What are some inherited traits?
• Hatches from an egg
• Has feathers and wings
• Has hollow bones
What are some inherited traits?
What are some inherited traits?
• A tree has–Leaves
–Branches
–Bark
–Roots
–Sometimes flowers or nuts
What are some inherited traits?
What are some inherited traits?
• A flower has–Petals
–Stem
–Leaves
–Roots
What are some inherited traits?
• This family has an inherited
trait. Can you tell what it is?
What are some inherited traits?
• Did you guess that they all had
brown hair?
•
•
•
Right / left dominance is the tendency
to favor one side of the body over the
other. People generally have a
dominant eye, meaning the brain
chooses between images perceived by
the right eye and the left eye. If neither
eye is dominant, the image jumps from
one eye to the other. There is no
accepted correlation between hand
dominance and eye dominance.
Procedure
Hold an index card with a small hole in
the center at arm's length. Look
through the hole with both eyes at a
distant object. Close one eye, then the
other. The eye that keeps the object
centered in the hole is the dominant
eye.