Monday: A Day
Aim: What is heredity?
Do Now: Using the overhead show students a picture of two parent rabbits
and their offspring. Ask students to choose the offspring of the parent. Where did the white rabbit come from? Mistakenly
placed in with the black rabbits? Discuss.
Procedure: Can offspring show a trait that is not seen in the parents?
Distribute pea pods. Ask students to open them up and record the differences and similarities. Have them compare with one
another. Expalin how each pea in the pod is like a child in each family. There are similarities but there area lso many differences.
Children in families show different traits. Genetics: The study of how triats are passed from parent to offspring. Reveiw
the nucleus, chromosome and gene. Traits: Characteristics. Gene: A small section on the chromosome that determines a
specific trait of an organism. Students in the double period will make a construction paper model of a sex cell chromosome
and a pair of body cell chromosomes. They must be 20 cm long and they must place 20 genes on their model by using pieces of
yarn. They must write why there are some similarities and some differences in the two kinds of chromosomes. ( Cell nucleus-Chromosome-
paired in body cells and single in gametes) (Cell nucleus has genes- On the chromosome adn there are two for each body trait
in body cells)
Homework # 10: UPCO text
book Read page 387-388 Answer Part A Q#1-4 and Part B Q#1-2
Tuesday: No School on Tuesday for Superintendent's
Wednesday: A Day
Aim: What is heredity continued?
Do Now: Take project material to your desk and complete your chromosome/gene
Procedure: Ask students to list five traits of a human. Five traits of a fly. Create a word
splash on the board. Discuss genetic terms with students. Explain the difference between heterozygous and homozygous. Heterozygous
have two different genes for the same trait. We call this a hybrid. Homozygous have two of the same kind of genes for that
trait. We call this PURE. The genetic makeup of an individual is called a genotype. The appearance of an organism is called
its Phenotype (what you see). An organsim can have the same phenotype but different genotypes. RULE: Whenever the dominant
trait is present it shows that trait. The dominant trait completely blocks the recessive trait from showing.
**Have a sensitivity discussion with students about the fact that a student may be adopted, in foster care of have a deceased
parent and not know that parents traits
Homework #11: Read page 395 of UPCO book
and complete part H Q#1-5
Thursday: B Day
Aim: How are traits passed from parents to thier offspring?
Do Now: Bring a Glencoe text to your desk. Look at the pictures of the
ear types on page 548. Ask someone to tell you what ear type you have and write it down, attached or free.
Procedure: Students will look at a specific trait that is passed down
from their parents. Create a table in your notebook using the student name as one variable and the phenotype as another variable.
Record the results from your classmates. Put this table on the board. Using the magnetic attached and free sperm and eggs,
show students have they received that trait from a make and female parent. Show all the gene combinations for earlobe traits.
FREE lobes=dominant and ATTACHED lobes=recessive
Homework#12: Complete the reteaching idea map
for traits of plants and animals.
Friday: A Day
Aim: How can knowing the types of genes a parent has be helpful?
Do Now: Do you have brown eyes, blue eyes or green eyes (naturally--no colored contacts please)
Once again create a table and record student names and their eye color.
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.
This lab can be completed this week if time permits otherwise it will be done one Monday. 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.
Have A Fantastic Weekend!