Names:
Grade & Section:
Sex Linked Genes Worksheet
Color blindness is a recessive, sex linked disorder in humans. Presented in the table
below are the genotypes and phenotypes of color blindness in humans.
Ana who is a normal female (carrier of the gene) and Tyler who is color blind male has a
50% chance of having a baby with color blind and has a 25% chance of having a normal baby
girl (carrier) and 25% chance of having a normal baby boy.
Procedure:
Study the table above and analyze the situation how Ana and Tyler have 50% chance
of having a baby with color blind and has a 25% chance of having a normal baby girl (carrier)
and 25% chance of having a normal baby boy. Answer the following guide questions and put
in the provided manila paper. You have 15 minutes to do the activity.
Guide questions:
1.
Use a Punnett square to show how did Ana and Tyler have
•
50% chance of having a color-blind baby
•
25% chance of having a normal baby boy
•
25% chance of having a normal baby girl with the carrier gene
2.
What is the genotype of Tyler?
3.
What is the genotype of Ana?
4.
How many percent does it has to have a normal baby?
5.
How many percent does it has to have a color blinded baby?
Group Activity Performance Rubrics
Criteria
5 points
4 points
3 points
2 points
1point
Quality of
inputs
Knowledg
e shared is
accurate
and broad
Knowledge
shared is
accurate
and limited
Knowledge
shared is
somewhat
accurate
and limited
Knowledge
shared is
inaccurate
and limited
Attempted
to share
Attitude
manifested
Participate
voluntarily
, actively,
enthusiasti
cally in
activities
with
considerati
on for the
feelings/o
pinions of
others
Participate
voluntarily,
actively,
enthusiastic
ally in
activities
with little
consideratio
n for the
feelings/opi
nions of
others
Participate
somewhat
actively,
enthusiastic
ally in
activities
with little
consideratio
n for the
feelings/opi
nions of
others
Participate
hesitantly
with no
enthusiasm
in activities
with little
consideratio
n for the
feelings/opi
nions of
others
Participate
only when
compelled
to do so
Task
performance
Performs
tasks (as
leader/
member)
without
errors
Performs
tasks (as
leader/
member)
with minor
errors
Performs
tasks (as
leader/
member)
some errors
Performs
tasks (as
leader/
member)
with many
errors
Attempted
to perform
tasks
TOTAL:
Student’s
Score