Answer:
F1
A A
a Aa Aa
a Aa Aa
All the offspring have flower located at axial position
F2
A a
A AA Aa
a Aa aa
Three offspring with genotype i,e Aa, Aa and Aa will have flower located at axial position
Only offspring with genotype "aa" will have flower located at terminal position
Explanation:
Let the allele "A" represent the characteristics of axial position of flower
Let the allele "a" represent the characteristics of terminal position of flower
Given -
"A" is dominant over "a"
F1 generation -
Two parents with homozygous genotype for both A and a are crossed . The punnet square for the cross between "AA" and "aa" is as follows -
A A
a Aa Aa
a Aa Aa
Thus the genotype of offspring is "Aa"
Since, "A" is dominant over "a", all the offspring have flower located at axial position
F2 generation-
The cross between two parents having heterozygous genotype "Aa" will take place .
The punnet square for the cross between "Aa" and "Aa" is as follows -
A a
A AA Aa
a Aa aa
Three offspring with genotype i,e Aa, Aa and Aa will have flower located at axial position
Only offspring with genotype "aa" will have flower located at terminal position
In the F1 generation, all the offsprings have an Aa genotype with flowers located at the axial position.
In the F2 generation, there are three genotypes i.e. AA, Aa, and aa, having 25% of flowers on terminal position.
What are Genotype and Phenotype?
The ultimate combination of alleles of those genes which are selected for studies is known as Genotypes.
Expression of genotype in the form of the trait is known as Phenotype.
When we selfed the combination obtained in the F1 generation, i.e Aa * Aa, we got three genotypes AA, Aa, aa in the ratio 1:2:1, and the phenotypic ratio of Axial: Terminal is 3:1.
Therefore, in the F1, only Aa genotype is obtained, while in the F2, AA, Aa, and aa genotypes with a ratio of 1:2:1 are obtained.
To learn more about Genotypes and Phenotypes, refer to the link:
https://brainly.com/question/902712
