Scribe Post 11/15/10

Notes:

Testcross:
used to determine true-breeding variety of plant (A_ x aa  cross an unknown dominant phenotype with a homozygous recessive to determine if second allele is A OR a.)

2-Factor Crosses:



















2 traits being passed on
- probabilities
2 coins flipped simultaneously.
Chance of tails/tails? 1/2 tails x 1/2 tails = 1/4.
- phenotypes
ratios, what you see
- genotypes
ratios, genes

*Within each trait, dominant allele before recessive.
*stay in the order of the traits that you are given
ex. SSyy
SsYY
SsYy
SSYy
ssYy
ssYY
Lab #34:
Probability
Mendel's Laws:  know these!!
-law of dominance
-law of segregation
-law of independent assortment

Read carefully!!

Homework:
Finish Lab #34, UP p.59-62

Make sure you understand Meiosis and Mitosis!!!

Next Scribe: CJ