Biology help about punnett squares and that kinda stuff?

hello peoplez ok i have a question on my biology homework that my own teacher cant explain to me. and he is a great teacher. please explain to me in the utmost simple terms because this whole thing is like studying pig-latin.here is my question.....

Cross a plant that is heterorygous for axial flowers with

a plant that has terminal flowers.

flower position: Dominant Allele Axial (A) Recessive Allele terminal (a)

what i need to know is how to find the Genotypic ratio and the Phenotypic ratio. here is the website to the same paper that i am working on and its NUMBER 5. and if u can help me with the other ones that would be even better.

thank you,

hydee g

Biology help about punnett squares and that kinda stuff?
One plant is heterozygous for axial. That means that it has "hetero" or "different" alelles Which means that its genotype (the actual genes, as opposed to the outward appearance) is Aa.



The other plant is terminal. The terminal trait is recessive. That means that in order for the trait to be a phenotype (the outward look) there must be two recessive alleles. the geno type of this plant is aa.



So you cross them like this. (rough sketch)



__A___a

a Aa aa

a Aa aa



The result is you get two Axial flowers (Aa) and two terminal flowers (aa). The Phenotypic ratio, which is [axial:terminal] is therefore 2:2 or simplified, 1:1



The genotypic ratio, Which is [Aa:aa], is also 2:2 or 1:1



Hope you understand!

flower arrangements