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

Oh no! Where do I go?

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.

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

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

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

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

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:

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

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… 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

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