January 5 and 6
Using a diploid number of 6, draw each stage of meiosis. To do so: Fold an
unlined sheet of paper into fourths. On each fourth, draw one stage of
meiosis. ALL of your drawings should be in color and should be color
coordinated. For Prophase I, do one drawing for up to the end of synapsis,
and one drawing for the end of crossing over. You may draw Telophase and
cytokinesis together in one square. Your drawing should take up the majority
of the square for full credit. This is worth 20 points and is due next class
period. be sure to include spindle fibers, centrosomes, and centrioles. Be
sure to label each phase.
January 12 and 13
EXTRA CREDIT OPPORTUNITY
Using January's National Geographic, read the article on twins. Afterwards,
write a two page paper (typed, times new roman, 12 pt. font, double spaced,
MLA margins and citations). For one page, summarize the article. For the
second, write your response to information in the article. 15 pts if
perfect.
Due to me by your class time on either January 19th or 20th.
ALSO, Section one and two of the genetics worksheet will be due on January
19th or 20th (depending on when you have class). These sections can be found
below.
To complete this assignment, do your work on another sheet of paper. You
must
show ALL of your work (this means make each punnett square). You will
receive
this assignment in pieces, so pay attention to the work I assign.
SECTION 1
For each of the following scenarios, give the genotype and phenotype
frequencies expected. Assume mendelian genetics apply.
1. homozygous dominant right handed man mates with a heterozygous right
handed woman
2. left handed woman mates with a man that is heterozygous dominant
right
handed
3. homozygous dominant for tongue rolling man mates with a woman that
is
recessive for tongue rolling.
4. A non tongue rolling man mates with a non tongue rolling woman
5. A left handed woman mates with a left handed man
SECTION 2
For the following dihybrid crosses, give all expected phenotype possibilities
for the offspring
1. Homozygous dominant widow peaked and homozygous dominant dimpled
woman mates with a homozygous dominant widow peaked homozygous dominant
dimpled man.
2. Heterozygous dominant widow peaked and heterozygous dominant dimpled
woman mates with a heterozygous dominant widow peaked heterozygous dominant
dimpled man.
3. A left handed non tongue rolling man mates with a heterozygous
dominant right handed and heterozygous dominant tongue rolling woman.
4. Homozygous dominant tongue roller and left handed woman mates with a
man that is heterozygous dominant right handed and heterozygous dominant
tongue rolling.
5. A left handed non tongue rolling woman mates with a left handed non
tongue rolling man.
January 19 and 20
Write your two null hypotheses for your F1 and F2 generations of your fruit
fly experiment. This should give you a total of FOUR null hypotheses.
January 23 and 30
SECTION 3
For the following, you will be interpreting crosses that are non mendelian.
Give the expected genotype and phenotype for each cross.
1. A heterozygous pink fower is crossed with a white flower. Assume
incomplete dominance.
2. A red flower is crossed with a white flower. Assume incomplete
dominance.
3. A person with type O blood mates with a person that has type AB
blood.
4. A person with heterozygous A blood mates with a person with
heterozygous B blood.
5. A person with type AB blood mates with a person that has heterozygous
B blood.
6. A woman that is a carrier for hemophilia mates with a man that has
hemophilia. Assume sex linked trait and hemophilia is recessive.
7. A woman that has hemophilia mates with a man that does not have
hemophilia.
OVER
Using your knowledge of genetics answer the following questions.
1. How is it that two people with black hair can have a child that is
blond?
2. If a couple has 8 children and all of them are left handed but one,
what is the genotype of each parent?
3. A horse that is heterozygous, has both red and white hairs in its
coat. Explain this.
