Admit Slip 2515 I saw this snake at

Admit Slip 2/5/15 I saw this snake at a pet store over the weekend! 1) His colors are the result of which type of inheritance pattern? ? 2) If this snake mated with a female of the same coloration, what would the phenotypic ratio of his offspring be? Date: 4/6/15 Topic: Dihybrid Crosses Page # ___

Admit Slip 2/5/15 Do you know what this coloration is called in snakes? Guess how much this snake cost… I saw this guy at a pet store over the weekend! 1) His colors are the result of which type of inheritance pattern? ? 2) If this snake mated with a female of the same coloration, what would the phenotypic ratio of his offspring be? Date: 4/6/15 Topic: Pedigrees Page # ___

Python Problem

Date: 4/6/14 Topic: Dihybrid Crosses Page # ___ Today in Room 315… ADMIT SLIP: Inheritance pattern of python? HW: Finish dihybrid practice worksheet CONTENT OBJ: SW complete Punnet squares for two traits using a dihybrid cross LANG. OBJ: SW define the law of independent assortment ANNOUNCEMENTS: Test is on THURSDAY. That leaves TODAY and TUESDAY to come for help afterschool/morning! AGENDA: Admit slip review Dihybrid Cross notes & practice Individual/partner practice (worksheet) EXIT SLIP: Ask any questions!

Review and move on… What is a monohybrid cross*? Deals with the inheritance of a single trait Example: pea color: Y = yellow, y = green YY = ______________ Yy = _______

2 Traits? Some of Mendel’s experiments involved two traits, such as BOTH pea color and pea shape (green & yellow) Wrinkled peas Round peas

Pea Genotypes Yellow = Y, green = y Round = R, wrinkled = r Genotype of purebreeding? Yellow wrinkled _____ Round green _____ What if you breed them?

Two genes… If the genes are on separate chromosomes, do they assort in the gametes TOGETHER, or INDEPENDENTLY? Thoughts? ? ?

Well, that’s NOT right!

BINGO!

Law of Independent Assortment* As recognized by Mendel during his work with breeding pea plants… Allele pairs separate independently during the formation of gametes* Meaning, traits are transmitted to offspring independently of one another* (A pea will separately pass on its green trait from its round trait, it does not have to pass on a “green round” trait)

Brave volunteer!! Please complete the following Punnet Square: (rest of the class, copy into notebooks!)** Yellow wrinkled pea Yyrr x x Green round pea yy. Rr

^^ Copy these genotypes into your journals, and write the phenotypes next to them**

In journal…

Dihybrid Practice Use the rest of the class time to complete the packet If you finish, you will not have homework due tomorrow (if you don’t, finish for homework!) You may work in pairs ONLY if you are consistently productive. If you prove not to be, I will ask you to work alone. Good luck!