Under no Uncertain TERMS

What you are seeing here is an example of dominate verses recessive genes and how they can effect the color of a flower!








Some key terms that might be helpful!





1) Genotype: it is the genetic make-up of an organism. Please note that organisms may look alike but have different genotypes.


2) Phenotype: it is the outward appearance of an organism. In Mendel's pea plant experiment and from the picture of the flowers you can see that just because the flower looks purple does not mean that we can tell by looking at it what the genetic make-up of the flower actually is. Some flowers may be dominate (PP) or some may be (Pp) which when put into a punnet square can change the outcome of the flowers.


3) Alleles: alternative form of a gene. This is what I did in the dragon demonstration


4) Cross-over: exchange of chromatin by homologous chromosomes during prophase 1 of meiosis. Results in considerably more genetic variation in gametes and offspring. An example of this was when I used the punnet squares with different parents and found out their off spring.


5) Dominant: Adjective used in genetics to refer to an allele that is always expressed in heterozygotes. It is denoted by a capital letter. For example, in the punnet squares I had parents that were dominate heterozygous (Gg) and dominate homozygous (GG)


6) Recessive: this is best described as an allele of a gene that is expressed when the dominate factor is missing. For example, in the punnet square with the flies I mentioned the 1:2:1 ratio. the recessive genes were in the (ll) or otherwise known as the homozygous recessive flies.


7) Cross: this is what it is called when you take the two parents and produce their offspring. the process in which this happens is calling crossing. The punnet square is an example of this taking place. If only one trait is being considered in a genetic ,then it is a monohybrid. If two traits are being considered in a genetic cross, the cross is called a dihybrid.