Scribe Post: 11/12/10

****For this round you must COMMENT ON ALEAST TWO OTHER BLOG ENTRIES BESIDES YOUR OWN!!



Today was a busy day in Bio 173!!
We started off with a spot of notes; Set 2, Mendels's Laws, Pgs. 2-5



Basically....

-Parents pass on heritable factors to their offspring, which in turn, retain individuality generation after generation.
- Self vs. Cross Fertilization are different ways an organism may reproduce.

• Self fertilization, occuring in flowers, consists of two gametes being formed within one organism. This type of reproduction does not need another organism to reproduce.
• Cross fertilization, occuring in humans, consists of one gamete being formed in each individual and the other in another individual. This type of reproduction needs two individuals with diferent gametes.

- The first generation are call P for parent generation. The following generations that follow are F1, F2, F3 and so forth.

- Hybrids (Aa)- the offspring of two different true breeding varieties (AA+aa)

- Monohybrid Crosses- 1 trait being passed

- Allele- alternative forms of a gene

- Dominant vs. Recessive- AA (dominant) vs. aa (recessive)

- Genotype- Our genetic structure (non-visible); AA, Aa, aa

- Phenotype- What we can see; Physical traits (visible); tall, short, freckles..ect.

- Homozygous- same; AA or aa

- Heterozygous- Different; Aa














Mendel's 2 Principles



Mendel's principle of segregation:


- Pairs of alleles separate during gamete formation






















Mendel's principle of independant assortment:


- each pair of alleles segregates independantly of the other pairs during gamete formation (meiosis)




















HOMEWORK:
- 1 FACTOR CROSSES ON UP PGS. 55-57
- FACE LAB (COMPLETE THE ENTIRE THING), UP PGS. 45-50
- USE COLOR PENCILS!
- READ DIRECTIONS VERY CARFULLY!


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