Materials: none
• Turn in Gizmo to blue tray• Keep notes at your desk. I will collect after our
first activity.• Catalyst: • 1. Name the stages of the cell cycle in order.• 2. Which type of cell division produces cells
with half the number of chromosomes as the parents?
Announcements
• Homework tonight: read/take notes on pages 277-282 in textbook. – Due Monday: 1, 2, 4, 6– Due Tuesday: 5, 7
• Late Mutant Makers projects will get 10% deducted.
Remind 101
• Period 1: Text @10b08 to (470) 296-2303 • Period 2: Text @1e06 to (470) 296-2303 • Period 4: Text @15b5d to (470) 296-2303 • Period 5: Text @b75a79 to (470) 296-2303• Period 6: Text @488f3 to (470) 296-2303 • Period 7: Text @67ec7 to (470) 296-2303
Objectives
• I can solve a puzzle using my knowledge of Mitosis and Meiosis.
Mitosis/Meiosis Review Activity
• You and a partner will get an envelope• Goal: You and your partner will work together
to properly connect the sides of each square piece. (the words/definitions must match up!)
• Winner will receive 8 tickets each and a special surprise
Star Quiz 13
• When you are done, turn in work and you may begin on your homework.
Objectives
• I can identify genotypes and phenotypes.• I can classify alleles as being dominant or
recessive.• I can determine whether the dominant or
recessive phenotype will be shown in a given situation.
Intro to Genetics
How do you know what your child will look like?
Why do people look like their parents? What are some characteristics you could share?
Complete the QUICK WRITE on your guided notes
Trait: A characteristic (what you look like)
Examples: hair color, eye color
You inherit your traits from your parents
Genetics: The study of how traits are passed from one generation to the next
Gene: A piece of DNA that controls a trait
Each gene comes in 2 versions (types)
Allele: Version (type) of a gene
You inherit 2 alleles for each gene: 1 from mom, 1 from dad
An allele is written as a letter
Example: T, t, B
Genotype: Your genes for a trait
Examples: BB, tt, Tt
Phenotype: Your trait (what you look like)
Examples: brown hair, blue eyes, red flowers
PHenotype = PHysical characteristics
Think: genotype or phenotype?
BB
Brown eyes
Curly hair
Bb
Blue Eyes
Hh
There are 2 kinds of alleles: dominant and recessive
Dominant: Allele that is always shown
Written as: a capital letter
Example: B, T, R
Recessive: Allele that is ONLY shown if it’s with another recessive allele
Written as: a lowercase letterExample: b, t, r
i.e. brown eyes (B) are dominant to blue eyes (b):
genotype phenotype
BB brown
Bb brown
bb blue
In flowers, the allele for pink flowers (P) is dominant over the allele for purple
flowers (p)
• Madison finds a purple flower in her garden. What is the genotype of that flower?
• Marco finds a pink flower to give to his girlfriend. What is the genotype of his flower?
Think: dominant or recessive?
Panther Pass The Panther Pass is to be done independently and silently.
Think: dominant or recessive?
1. B2. Always shown3. h4. T 5. Only shown when it is with another recessive allele 6. s
6. What is the difference between a dominant and recessive trait? Explain
7. In zebras, the allele for skinny stripes (X) is dominant to the allele for fat stripes (x). What is the genotype of a zebra with fat stripes?
Think: dominant or recessive?
1. B2. Always shown3. h4. T 5. Only shown when it is with another recessive allele 6. s
Think: dominant or recessive?
1. B - Dominant2. Always shown - dominant3. h - recessive4. T - dominant 5. Only shown when it is with another recessive allele - recessive6. s - recessive
6. What is the difference between a dominant and recessive trait? Explain
Dominant traits are always shown and recessive traits are only shown when paired with another recessive allele
7. In zebras, the allele for skinny stripes (X) is dominant to the allele for fat stripes (x). What is the genotype of a zebra with fat stripes?xx
