1. WARM UP What’s the difference between these two karyotypes?

2. Oh no! Where do I go?

3. What is the “other” pair of chromosomes called?
What is an AUTOSOME?
What is the “other” pair of chromosomes called?
Which one is longer?
Name
On a new piece of paper, please fold it into 1/4ths and in one box use a Wolf book (p 170) to answer three questions all in the first box.

4. What is an AUTOSOME?
What is the unmatched pair of chromosomes called?
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.
dad P X Y
mom xx xy xx xy

5. 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.
What is an AUTOSOME?
What is the unmatched pair of chromosomes called?
Which one is longer?
Name
dad P X Y
mom xx xy xx xy
Sex-linked gene:
Carrier:
Example: X-Linked Recessive
Genotypes / Phenotypes
XH XH
XH Xh
Xh Xh
XH Y
Xh Y
Normal Female
Carrier Female
Affected Female
Normal Male
Affected Male

6. In the last box, set up the x-linked trait Punnett Square for a carrier female and a white eyed male
Describe the genotypes and phenotypes of the offspring.
What is an AUTOSOME?
What is the unmatched pair of chromosomes called?
Which one is longer?
Name
dad P X Y
mom xx xy xx xy
Sex-linked trait:
Carrier:
XH = Normal
X h = hemophilia
Y = no allele
Example: X-Linked Recessive
Genotypes / Phenotypes P X Y
XH XH
XH Xh
Xh Xh
XH Y
Xh Y
Normal Female
Carrier Female
Affected Female
Normal Male
Genotypes: Phenotypes:
Affected Male

7. Stop and Think (you don’t have to write this)
How is this similar to Mendelian inheritance?
How is this different?

8. On the Back…
Problem #_____
Problem #_____ P X- Y P X- Y
You and your group must practice 4 more Punnett square crosses by rotating the group problems
Genotypes and Phenotypes:
Genotypes and Phenotypes:
Problem #_____
Problem #_____
You only have to write genotypes and phenotypes… you don’t have to draw the Punnett square on your paper P X- Y P X- Y
Genotypes and Phenotypes:
Genotypes and Phenotypes:

9. ANSWER KEY #1 and #7: #2 and #6: #3 and #5: #4 and #8:
Normal female, normal male, carrier female, affected male
#2 and #6:
Two carrier females, two normal males
#3 and #5:
Carrier female, normal male, affected female, affected male
#4 and #8:
Two carrier females, two affected males

10. Partner class work: (Homework if you don’t finish)
Pick up new packet
Work on: sex-linked traits practice problems
Pg 2

11. On the back… Hemophilia is an x-linked recessive trait
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
Normal Female x Affected Male
Carrier Female x Normal Male
Affected Female x Normal Male
Carrier Female x Affected Male
For each one – write out the genotypes and phenotypes of the expected offspring

12. On the back… Hemophilia is an x-linked recessive trait
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
Normal Female x Affected Male
Carrier Female x Normal Male
Affected Female x Normal Male
Carrier Female x Affected Male
For each one – write out the genotypes and phenotypes of the expected offspring