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Posted: March 7th, 2023
List
whether the student’s was positive or negative for each characteristic and
include whether the characteristic is dominant or recessive. (6 points)
a. Blood type
b. Widow’s peak
c. Free ear lobes
d. Tongue rolling
e. Hitchhiker’s thumb
f. Left thumb dominance
g. Little finger bend
h. PTC taster
i. Mid-digit hair
j. Facial dimples
k. Freckles
l. Cleft chin
Can the
student tell from blood type if the student is heterozygous or homozygous?
Explain. (5 points)
Select a
trait of interest.
A. What was the trait? (1
point)
B. What is the phenotype for
the trait, and is this the dominant or recessive allele for the trait? (2
points)
C. What are the possible
genotypes for the parents? (2 points)
D. Include the results of
one Punnett square, showing a possible combination between alleles for the
trait from the parents by filling in the genotypes according to the numbers in
the square, below. (Note: You do not need to submit the Punnett square itself,
only the results of the Punnett square.)
1
2
3
5
6
4
7
8
E. Based on the cross, what
percent of children born to the parents would express the trait? (1 point)
Create a
Punnett square to determine the possibility of a couple having a
color-blind child if the mother has the recessive trait on one X and the
father is color-blind. HINT: Use Xb to indicate an X with the
color-blindness trait. How many female offspring will be color-blind? How
many male offspring? (5 points)
From the
Human Karyotype Activity, what was the Karyotype Group number? What was
the result of the karyotype? (Include the sex and the chromosomal
disorder, if applicable. If there was no chromosomal disorder, the student
must state that the individual was normal.) (5 points)
Give an
example of a situation in which it would be important to create a
karyotype for an individual. Explain. (5 points)
Genetically
speaking, why is it important not to mate with a close relative? Explain.
(5 points)
Does a
karyotype tell all of a person’s genetic characteristics? Explain. (5
points)
Why is a
photograph of cells in metaphase utilized when constructing a karyotype?
(5 points)
What does
it mean to be a carrier of a genetic defective characteristic? When might
it be important to know if one is a carrier? (5 points)
Using your
results from the hemophilia procedure, answer the following questions with
a population of 120 individuals (n = 120): (4 points)
A. What were the possible
genotypes of the offspring?
B. What is the probability
of males having hemophilia out of the entire population?
C. How many females would
have hemophilia?
D. How many carriers would
there be?
Explain
why more males tend to suffer from X-linked disorders than females. (5
points)
The
student has a friend that knows the student is taking Biology, and she is
confused about her blood type. Her blood type is O, but her dad is A and
her mother is B. She asks the student if it is possible for her parents to
have a child that is O. Explain the answer to her. (5 points)
In a
flower garden, the student has purple and white pansies. The student
notices that a new pansy has sprouted. When it finally flowers, the pansy
is lavender. Explain how this happened. (5 points)
With a
botanist friend’s help, the student decides to cross the lavender pansy
with the white pansy. Will this result in any purple pansies? Explain. (5
points)
(Application)How might
the information gained from this lab pertaining to Human Genetics be
useful to the student, or how can the student apply this knowledge to
everyday life as a non-scientist? The application paragraph will be graded
according to the rubric below. (20 points)
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