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