Monday: A Day
Aim: How are traits passed from parents to thier offspring?
Do Now: Using the overhead show students the punnett square.
Give three scenarios on the board and ask students to porject the outcome of the joining of these parents genotypes. Get lab
folders and bring to desk. Lab #21 Offspring Determination
Procedure: What is the difference
between expected results and observed results? Review genotype and phenotype again. Explain that their is an easier way to
figure out what combinations can occur between the egg and the sperm for an organisms traits. Punnett square: A way to show
which genes combine when the egg and sperm join. RULE: Capital letter represents the dominant gene and a lower case represents
the recessive gene. Ex: F for free lobe and f for attached lobe. Create a punnet square and explain the expected
results for the ear lobe trait. Discuss expected vs. observed results. Then complete a punnet square for eye color. B
for Brown eyed and b for blue eyed. Use the overhead to have students practice with punnett squares for other traits.
Complete Lab 21 Book #26-2. What determines how offspring will look? Page 556 of text. Use white beans and red beans in a
paper bag. Use R for doinant red adn r for recessive white. Complete punnett squares to show expected results and then put
the beans in the bag and remove one and then another. These stand for the gene combination that results when the egg
and sperm join. Record your results in a table. Write a hypothesis for how many RR, rr, Rr combinations you will get
in 40 trials. Record resluts and analyze your table and answer questions to complete lab.
Homework # 12: Complete the punnett square
Tuesday: B Day
Aim: Why is Gregor Mendel's work important?
Do Now: What is the difference between your genotype and your phenotype?
Procedure: Discuss Gregor Mendel. Monk from Austria who conducted experimants with pea plants
and from his experiments he was able to explain some basic laws of genetics. He looked at several traits See chart in UPCO
book on page391 and discuss traits. Use overhead to show chart from page 393. Point out that Mendel did not know about genes
or chromosomes but theroized dominance and recessive traits. Show students a genetic cross so they appreciate the punnett
square. Practice using the punnett sqaure for expected results. Use the chart on page 396 and dictate to students the genotypes
they will use to cross test.
Homework #13: UPCO Text: page 395-396 Read H and I answer all questions on both
Wednesday: A Day
Aim: What are the laws of chance and probability?
Do Now: Draw a genetic cross between a heterozygous tall pea plant (Tt) and a homozygous tall
pea plant (TT) Parents: Gametes: and Offspring. Then make a punnett square for the same genetic cross
Procedure: Probability tells you how much chance there is for something
to happen. Tossing a coin: 50/50 heads or tails. Probability predictions are based on large numbers of events. Lab #22
Testing Probability Laws Page 401-402 of UPCO Book Students will complete this lab.
Homework #14: Complete page 400 of UPCO
book Skill Practice Q. # 1-4
Thursday: B Day
Aim: To reveiw Chapter 26: Inherited Traits
Do Now: Take a study guide packet to your desk
Procedure: Students will complete the study quide packets and reveiw for the exam on Inherited traits.
Homework#14: Complete page 405 in your
Friday: A Day
Aim: To evaluate our knowledge of Inherited traits
Do Now: Play a reveiw game of Jeopardy or Tic Tac Science prior to exam
Procedure: Students will have the Inherited traits exam read to them to evaluate their
knowledge of Gregor Mendel's work, the value of the punnet square, probability, distinguish between dominant and recessive
genes, and to describe how different gene combinations result from fertilization and how traits are passed from parent to
Have A Fantastic Weekend!
Monday: B Day
Aim: What is incomplete dominance?
Do Now: Take the reteaching worksheet and complete
the chromosome number reveiw questions.
Procedure: We will revisit the human traits that we discussed in the last chapter:
earlobe attachment, dimples, thumbs, cleft chin, straight hair, etc. You know the difference between a recessive trait ans
a dominant trait. There are some traits that are neither totally recessive or totally dominant. This is called incomplete
dominance. If you put a piece of blue glass over a piece of yellow glass you would see green. If one was dominant
and the other recessive the dominant would show, however in incomplete dominance a new trait shows, one that is a blend of
the dominant and recessive traits. Blend pure dominant snapdragons with pure white snapdragons and the offspring are pink.
The genes themselves DO NOT combine. If two pink snapdragons are mated they produce, one red, one white and two
pinks again. Discuss red blood cells. Look at the transparency master and explain incomplete dominance. Sickle cell
anemia is a genetic disorder in which all the red blood cells are shaped like sickles. This is hereditary. EXTRA CREDIT:
Discuss this ethical question in a one page paper: Can couples choose the sexes of their children? See page 569 for situations:
Write the situation you chose and explain your answer scientifically and morally.
Homework : There will be a notebook
check tomorrow. Your homework
is to organize your materials in your binder and worksheet folder.
Tuesday: A Day
Aim: What human traits show incomplete dominance?
Do Now: Using the table for Blood types and genes on page 575 of Glencoe text, create two
punnett squares to show the expected results of the blood type of offspring if the following parents mated. Type O with Type
B and Type AB with Type A. What are the results? Draw the key, the cross and the explain the results.
Procedure: Are you color blind? Draw an example of female genes and male genes on the boar.
Show four sex linked genes. Blood clotting, color vision, tooth color, and skin dryness. Explain how a make is nore likely
to be born with color blindness than a female. Color blindness is a problem in which red and green look like shades of gray
or other colors. Have students all take the color blindness test. Use the overhead with a color blindness transparency and
ask each student to come up and tell you what they see on the transparency. Then have students predict results if a woman
with CC genes and a man with a c gene on his X chromosome had children. Create punnett square. Use the reteaching worksheet
Homework #16 : The gene for nearsightedness in humans is found on the X chromosome. A boy has a nearsighted father. Does
this mean the boy will become nearsighted. Why or why not? Explain your answer.
Wednesday: B Day
Aim: Which human traits are more common?
Do Now: Students must get lab folders, record lab. Lab #22 Human Traits. Give students a Glencoe
text book and have them turn to page 577. Students will have to copy the data table onto a sheet of paper: Trait: Dominant
Procedure: Allow students to choose a partner adn have them check one
another for each of the traits. They must place a check mark in the table if they have the dominant or recessive trait. The
dominant and recessive trait is located on the bottom of the page in a chart already completed. I will draw the same table
on the board and we will compare results when finished. Students must answer all the questions for the lab. Data and observation
1-2 and Analyze and Apply 1a, b, c and 2. Have students in period 6 change brood and give the ducklings water and food.
Thursday: A Day Intercultural Fair
Aim: What are genetic disorders?
Do Now: Write five words on the board and make most of the letters backwards.
Ask students to read these and define them. This will lead us into our discussion of genetic disorders. One of them being
dyslexia. Take a Glencoe text to your desk. PAGE 578-580
Procedure: Explain how errors in chromosome numbers can occur during meiosis
when the sister chromatids are supposed to pull apart and don't. They get stuck together. This is called dysjunction.
Read this directly from the text book and allow students to look at diagrams to help understand the concept. PUT THE IDEA
MAP ON BOARD AS NOTES. The inablility to produce sex cells and death are resluts of haveing dysjunction in your chromosome
patterns. Down sydrome comes from having an extra autosome (body cell). Genetic disorders such as hemophelia are caused by
having the gene for the disorder. It almost always shows up in males. Can a female get hemophelia? How? Explain. Dyslexia
is also a disorder caused by a dominant gene inherited on a body cell. Use the SKILL worksheet to look at genetic disorders
in newborn babies and practice graphing skills.
Friday: B Day THIRD QUARTER ENDS
Aim: What does it mean when you hear "It Runs In The Family"?
Do Now: Using your text book define Genetic Counseling: Page 580
Procedure: Discuss genetic counseling and why there may be a need for it within a family.
Use the questions on page 580 as a guide and have children chart how a child would get cystic fibrosis from two parents that
do not have the disease. Distribute study guide packets and begin reviewing chapter 27 for out test next Tuesday.