Wednesday, February 15, 2012

Today we reviewed the quiz from Monday. If you still have questions please come and see me at lunch.
We will have another quiz on Punnet squares and sex linked traits on Tuesday.
Unit Test will be Thursday 2/23 (New date)

Remember, you only use X and Y in your punnett square if it is for a sex linked trait. Otherwise you pick a letter to represent your autosomal trait (eye color, hair color etc). For example. B- brown eyes, b- blue eyes. The lower case letter is the recessive form. Remember you must have both recessive alleles for a recessive trait to be expressed. Otherwise you will exhibit the dominant form (BB or Bb) for your phenotype.

Remember genotype refers to the alles like, Bb
Phenotype is the physical form of the trait - Brown eyes

Tonight: complete the worksheet on Pedigrees. We will go over it tomorrow in class.