Tuesday's Daily Question and Wednesdays Open Notes Quiz

Daily Question From Tuesday (We did the first scenario and then I had you cross a homozygous recessive organism with a Heterozgote)

Yesterday's daily question just went through even more examples of punnett squres.  (See image above)

 **We also went through more of the directed reading focusing on the section "Modeling Mendel's Laws."  This led us into a discussion about doing test crosses and an introduction into making Pedigrees.  A test cross is used when you want to find out the genotype of an organism that has a dominant phenotype.  Remember, if an organism expresses the dominant phenotype, they could be either Homozygous dominant or heterozgyous.  To determine which they are, you cross them with a known homozygous recessive organism.  If ANY of their offpsring express the recessive trait, then that means the parent MUST have been heterozygous.  If ALL of their offpsring expresses the dominant trait, then that means the parent was most likely Homozygous dominant. 

Today's Open Notes quiz focused mostly on Modeling Mendel's Laws (punnett squares), but brought together everything we have talked about so far with this chapter.  This grade will be the last grade of this nine weeks.  I also discussed Extra credit options with most classes - stay tuned here and to edline for more details!!!!