Announcements: Quiz Wednesday or Thursday.
Homework: Finish Lab 35 (Due Friday) & 49-50 if not yet done.
Today’s period consisted of going over the homework Mr. Paek had assigned yesterday (12.6.2010) and starting Lab 35 in class.
• For example, one problem that we went over was (pg. 48 practice)...
Question: What is the probable genotype of individual D?
Solution: Since we know D’s parents are Hh x hh we can now make a Punnett square.
To determine which one genotype is correct, we must look at D’s offspring. Individual D’s husband has a genotype of hh. One of their children, K, has Hh. The Punnett squares below show two possible crosses for C x D given that D is either Hh or hh.
Therefore, since it is not possible to have an offspring who is Hh (K), the genotype for D must be Hh.
Also, we went over what we had learned so far such as the single traits, dihybrid, codominant, blood type, and sex linked genes. (Briefly explained below)
• Single trait- a trait controlled by a single gene that has two alleles.
• Dihybrid- mating between two individuals, both of whom are heterozygous for the two genes being followed. i.e: AaBb x AaBb
• Codominant- Describes two or more alleles that are equally dominant.
i.e: WR- WR= White + Red
• Blood Type- Contains three different alleles, two copies of which exist in all human body cells.
• Sex Linked Genes- concerning characteristics that are determined by genes carried on the sex chromosomes. (X & Y)
This concludes our Bio day :)
Next Scriber- Lauren
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