WARM UP Whats the difference between these two
WARM UP What’s the difference between these two karyotypes?
Oh no! Where do I go?
On a new piece of paper, please fold it into 1/4 ths and in one box use a Wolf book (p 170) to answer three questions all in the first box. 1. What is an AUTOSOME? 2. What is the “other” pair of chromosomes called? 3. Which one is longer? Name
In the next box, lets prove there is a 50/50 chance of getting a girl or a boy when you have a baby! Please set up the Punnett square. 1. What is an AUTOSOME? 2. What is the unmatched pair of chromosomes called? 3. Which one is longer? Name dad m o m P X X X Y xx xy
In the next box, use your textbook to define the two terms (Carrier is on page 143). Leave space at the bottom to add more below the Genotypes and Phenotypes. 1. What is an AUTOSOME? 2. What is the unmatched pair of chromosomes called? 3. Which one is longer? Sex-linked gene: Carrier: Example: X-Linked Recessive Genotypes / Phenotypes XH X H Normal Female XH X h Carrier Female Xh X h Affected Female XH Y Normal Male Xh Y Affected Male Name dad P m o m X X X Y xx xy
In the last box, set up the xlinked trait Punnett Square for a carrier female and a white eyed male Describe the genotypes and phenotypes of the offspring. 1. What is an AUTOSOME? 2. What is the unmatched pair of chromosomes called? 3. Which one is longer? Sex-linked trait: Carrier: Example: X-Linked Recessive Genotypes / Phenotypes XH XH Normal Female XH X h Carrier Female Xh X h Affected Female XH Y Normal Male Xh Y Affected Male Name dad X P X X m o m Y xx xy XH = Normal X h = hemophilia Y = no allele P X Y X X Genotypes: Phenotypes:
Stop and Think (you don’t have to write this) • How is this similar to Mendelian inheritance? • How is this different?
On the Back… You and your group must practice 4 more Punnett square crosses by rotating the group problems You only have to write genotypes and phenotypes… you don’t have to draw the Punnett square on your paper Problem #_____ P X- Y Problem #_____ P X- X- Genotypes and Phenotypes: Problem #_____ P X- Y Y Genotypes and Phenotypes: Problem #_____ P X- X- Genotypes and Phenotypes: X- X- Y Genotypes and Phenotypes:
ANSWER KEY #1 and #7: #2 and #6: Normal female, normal male, carrier female, affected male Two carrier females, two normal males #3 and #5: #4 and #8: Carrier female, normal male, affected female, affected male Two carrier females, two affected males
Partner class work: (Homework if you don’t finish) • Pick up new packet • Work on: sex-linked traits practice problems Pg 2
On the back… XH = Normal Blood clotting X h = Hemophilia Y = no allele for blood clotting • Hemophilia is an x-linked recessive trait • Draw the following Punnett Squares 1. Normal Female x Affected Male 2. Carrier Female x Normal Male 3. Affected Female x Normal Male 4. Carrier Female x Affected Male For each one – write out the genotypes and phenotypes of the expected offspring
On the back… XH = Normal Blood clotting X h = Hemophilia Y = no allele for blood clotting • Hemophilia is an x-linked recessive trait • Draw the following Punnett Squares 1. Normal Female x Affected Male 2. Carrier Female x Normal Male 3. Affected Female x Normal Male 4. Carrier Female x Affected Male For each one – write out the genotypes and phenotypes of the expected offspring
- Slides: 12
