The flowers of Japanese morning glory may be cither blue, scarlet, or purple. Wh
ID: 93653 • Letter: T
Question
The flowers of Japanese morning glory may be cither blue, scarlet, or purple. When a true- breeding blue strain is crossed with a true-breeding scarlet strain the F_1 generation is all blue. When the F_1 generation is self-crossed, the F2 generation is: 9/16 blue 6/16 purple 1/16 scarlet Provide a genetic model to explanation these results. Create and define the necessary gene or genes and genetic symbols for your model and then, on the diagram of the cross below, label all of the groups with their genotype according to your model. Explain how the genes work to give the observed results.Explanation / Answer
Answer:
When both genes are present together, there is an increase in Phenotype is observed.
True Breeding Blue (AABB) x True Breeding Scarlet (aabb)
AABB x aabb
A B a b ……… Gametes
AaBb (True Bredding Blue) ………………… F1 Generation
AaBb x AaBb (F1 selfing)
AB
Ab
aB
ab
AB
AABB (Blue)
AABb(Blue)
AaBB(Blue)
AaBb(Blue)
Ab
AABb (Blue)
AAbb (Purple)
AaBb(Blue)
Aabb(Purple)
aB
AaBB(Blue)
AaBb(Blue)
aaBB(Purple)
aaBb(Purple)
ab
AaBb(Blue)
Aabb(Purple)
aaBb(Purple)
Aabb (Scarlet)
AB
Ab
aB
ab
AB
AABB (Blue)
AABb(Blue)
AaBB(Blue)
AaBb(Blue)
Ab
AABb (Blue)
AAbb (Purple)
AaBb(Blue)
Aabb(Purple)
aB
AaBB(Blue)
AaBb(Blue)
aaBB(Purple)
aaBb(Purple)
ab
AaBb(Blue)
Aabb(Purple)
aaBb(Purple)
Aabb (Scarlet)
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