Transcript Dominant and Recessive Traits

Dominant and
Recessive Traits
Data Table and Graphing Review
Data Tables
O Data tables are used to organize the data you collect
O A table is a series of columns and row
O A title and labels helps the reader understand the
information presented in the table
Title
Label
Label
Label
Label
Label
Label
Graphs
O A graph is used to show a visual of the data
O Graphs help identify patterns and trends
O A bar graph is used to compare a sets of data
O A line graph is used to show changes in data over
time
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Series 1
Series 2
Series 3
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Series 1
Series 2
Series 3
Dominant and Recessive Traits
O A dominant trait is the trait that appears when two different
alleles are inherited for the same trait.
Tt
T= tall t= short
O A recessive trait is the trait that seems to disappear when two
different alleles are inherited for the same trait.
Yy
Y= yellow seeds
y= green seeds
Let’s collect some data!
O First we must create a data table.
O Draw a data table with 2 rows and 9 columns
O Label the first column with “type of trait” and the
second row with “# of students”
Type of
Trait
# of
students
Let’s collect some data!
O Let’s count the number of students with dominant
brown hair color. (Place a D next to this label in your
data table for dominant.)
O Then lets count the number of students with recessive
blonde or red hair. (Place a R next to the label in your
data table for recessive.)
Let’s collect some data!
Type of
Trait
# of
students
Brown
hair (D)
Blonde or
red hair
(R)
Let’s collect some data!
O Let’s count the number of students with dominant free
ear lobes. (Place a D next to this label in your data
table for dominant.)
O Then lets count the number of students with recessive
attached ear lobes. (Place a R next to the label in your
data table for recessive.)
Let’s collect some data!
Type of
Trait
# of
students
Brown
hair (D)
Blonde or
red hair
(R)
Free Ear
lobes (D)
Attached
Ear lobes
(R)
Let’s collect some data!
O Let’s count the number of students with dominant
widow’s peak. (Place a D next to this label in your data
table for dominant.)
O Then lets count the number of students with recessive
no-widow’s peak. (Place a R next to the label in your
data table for recessive.)
Let’s collect some data!
Type of
Trait
# of
students
Brown
hair (D)
Blonde or
red hair
(R)
Free Ear
lobes (D)
Attached
Ear lobes
(R)
Widow’s
Peak (D)
No Widow’s
Peak (R)
Let’s collect some data!
O Let’s count the number of students with dominant
tongue rolling. (Place a D next to this label in your data
table for dominant.)
O Then lets count the number of students with recessive
non-rolling. (Place a R next to the label in your data
table for recessive.)
Let’s collect some data!
Type of
Trait
# of
students
Brown
hair (D)
Blonde or
red hair
(R)
Free Ear
lobes (D)
Attached
Ear lobes
(R)
Widow’s
Peak (D)
No Widow’s
Peak (R)
Tongue
Rolling (D)
Non-rolling
(R)
What type of graph should we
make?
A Bar Graph!
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Dominant
Recessive
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Category 1 Category 2 Category 3 Category 4
Steps to Make a Bar Graph
1. Label the x and y axis
2. Name the x and y axis
3. Create categories on
the x and y axis
4. Plot your data
5. Color code
6. Create a key
*NOTE*
X-categories is the
information that
does not change
Y-categories is the
information that
changes