Di-hybrid crosses
Skill 5: Determine the genotypes and phenotypes of the offspring of a dihybrid cross. (Complete the dihybrid cross problems below and check your answers before the quiz.)
Di-hybrid crosses
Di-hybrid crosses
'Di' means two, so di-hybrid crosses look at two traits at the same time. In the example in the video, they looked at cats who may or may not have hair and may or may not like sinks.
'Di' means two, so di-hybrid crosses look at two traits at the same time. In the example in the video, they looked at cats who may or may not have hair and may or may not like sinks.
Independent assortment
Independent assortment
Gregor Mendel hypothesized about independent assortment, the idea that inheriting one trait does not affect the chances of inheriting a different trait. For example, if your Mom has blond hair and blue eyes, your chances of getting her blond hair are unrelated to your chances of getting her blue eyes. You could get both traits, one without the other, or neither trait.
Gregor Mendel hypothesized about independent assortment, the idea that inheriting one trait does not affect the chances of inheriting a different trait. For example, if your Mom has blond hair and blue eyes, your chances of getting her blond hair are unrelated to your chances of getting her blue eyes. You could get both traits, one without the other, or neither trait.
When setting up your Punnett square...FOIL first.
When setting up your Punnett square...FOIL first.
FOIL - stands for First, Outer, Inner, Last
FOIL - stands for First, Outer, Inner, Last
Your gametes in the example above would be, "ac, ad, bc, and bd."
Your gametes in the example above would be, "ac, ad, bc, and bd."
If you don't like the FOIL method...
If you don't like the FOIL method...
Another way to find the gametes for a dihybrid cross is to create a 'baby' Punnett square. See example below.
Another way to find the gametes for a dihybrid cross is to create a 'baby' Punnett square. See example below.
Complete the page below in your packet, then ask for the answer key to check your work.
Complete the page below in your packet, then ask for the answer key to check your work.
Ask me for the answer key to be sure your work is correct.
Ask me for the answer key to be sure your work is correct.