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Dominant and Recessive traits
- characteristacs: Seed color (yellow or green), Seed Shape ( smooth or rough) and Flower color ( white, red or pink)
- Such caracterisc variations are known as traits
- Each variation is either 'dominant' or "recessive"
- Recessive trait: is as one that tends to remain hidden in certain generations of pea plants
- Dominant trait: a trait that tends to appear in those same generations
- is a physiological feature, bodily characteristics, or behavior of an organism ( forma katoruyu vidno)
- the genetic make-up of an organism
- A genotype of "YY" results in phenotype of yellow seeds
- A genotype of "yy" resluts in phenotpye of green seeds
Parental Generation (P)
- Plants from pure line
- Pure line: is a population that breeds true for (show now variations in) the particular character being studied. ex. only purple flowers.
- the offspring of the parental generation
- although these seeds were developing withing the pods of the parental generation, they represented the new generation - the F1 gen.
F1 generation(pees in the P generation) where planted and let grow from them. Then, this plants were allowed to self polinate and fertilized and develope F2 Generations that developed yellow seeds and green seeds
- alternative forms of a single gene
- ex. 1 gene for seed color came in pairs (2 alleles) - one of which coded for yellow seeds, the other for green seeds.
- These alleles resided on separate homologous chromosomes
Law of Segretation
- Differing characters in organisms result from two genetic elements (allels) that separate in gamete formation, such that each gamete gets only one of the two alleles. - seperation of homologous chromosomes during meiosis
- or from notes - pair sof alleles separate during gamete formation. The fusion of gamets at fertilization creates allele pairs again.