Download Genetic Traits Powerpoint

Heredity
• How would you describe yourself so that
someone would recognize you?
• What traits make you unique and different
from others?
Cornell Notes
Concept Notes
Trait
A quality or characteristic that
describes something.
Physical Traits: Can be seen by others
Ex: Eye color, hair color, height, left
handed
Dominant Trait
I think…
Recessive Trait
I think…
Heredity
Hand Clasp Right over Left?
What do these words
mean?
Dominant and
Recessive
Cornell Notes
Concept
Notes
Trait
A quality or characteristic that describes something.
Physical Traits: Can be seen by others
Example: Eye color, hair color, height, left handed
most
important,
Dominant I think…
powerful, or influential
Trait
Recessive I think… tending to go
backward or recede
Trait
Heredity
Cornell Notes
Concept
Notes
Trait
A quality or characteristic that describes something.
Physical Traits: Can be seen by others
Eye color, hair color, height, left handed
I think . . . most important, powerful, or influential
Dominant An inherited character determined
Traits
by a dominant gene
I think . . . tending to go backward or recede
Recessive An inherited character determined
Traits
by a recessive gene
Heredity
Dimples (DD, Dd) No Dimples (dd)
Detached (EE, Ee) or attached (ee)
Earlobes
Freckles (FF, Ff) No Freckles (ff)
Can Tongue Roll (TT, Tt) or Can’t
(tt)
Normal (BB, Bb) Color Blindness (bb)
Can you see the
number inside
the circle?
If you cannot,
you may be
colorblind
What traits do you have?
• Work with your partner and help each other
identify what traits you have.
• Under observation, record the trait you have
• Next, identify if your traits are Dominant or
Recessive.
• When done, answer the “Think Critically
Questions.”
• Exceeds: circle other traits that you express
What traits do we have in
common?
Cornell Notes
Concept
Notes
Trait
A quality or characteristic that describes something.
Physical Traits: Can be seen by others
Eye color, hair color, height, left handed
Dominant Traits
An inherited character determined by a dominant gene
Recessive
Traits
An inherited character determined by a recessive gene
Heredity
The passing of traits from parents
to children
Dominant or Recessive?
Dimples
Brown
eyes
Red
hair
Attached
earlobes
Homework: Survey family genetic traits!
Right (RR, Rr) or Left (rr) handed?
Curly (HH, Hh) or Straight (hh)
Cleft Chin (CC, Cc) or No Cleft (cc)
Widow’s Peak (WW, Ww)
or Straight (ww)
Allergies (AA, Aa) or No Allergies (aa)
What are traits?
• Physical Traits
– Can be seen by others
– Eye color, hair color, height, left handed
• Acquired Traits
– Learned skills
– Playing a sport, riding a bike, playing a musical
instrument
• Behavioral Traits
– Instinctual actions
– Nest building and migration
Review Terms Used in
Modern Genetics
• Genotype
– The particular alleles (genes) an individual carries
– They are inherited from your biological parents
– Genes control your traits
• Phenotype
– An individual’s observable traits
• What people can SEE when they look at you
Review Terms Used in
Modern Genetics
• An individual with non-identical alleles of a
gene is heterozygous for that gene
– Examples: Bb, Tt, Aa
• An individual with identical alleles of a gene is
homozygous for that gene
– Examples: BB or bb, TT or tt
Terms Used in Modern Genetics
• An allele is dominant if its effect masks the
effect of a recessive allele paired with it
– Capital letters (A) signify dominant alleles;
lowercase letters (a) signify recessive alleles
– Homozygous dominant (AA)
– Homozygous recessive (aa)
– Heterozygous (Aa)
Data
• We will now record our class data and graph
our results
• Does our data support which genes are
dominant and which genes are recessive?
• What about the whole 7th grade?