two true breeding strains of peas, one with (T gene) vines and violet (V gene) f
ID: 19004 • Letter: T
Question
two true breeding strains of peas, one with (T gene) vines and violet (V gene) flowers and the other with dwalf (t) vines and white (v) flowers, were crossed. All the F1 were tall and produced violet flowers. When the plants were test-crossed to the dwarf, white parents strains, the following offspring were obtained-38 tall, violet; 53 tall, white; 57 dwarf, violet; 52 dwarf, white. QUESTIONS WHAT ARE THE GENOTYPES OF THE PARENTS, F1 and offspring from the test-cross? What would the genotypes of the F2 be if the F1 lines were crossed?Explanation / Answer
Genotypes Parents: Tt Vv F1 genotypes are gotten by crossing the parents in a Punnent square Genotypes F1: TtVv X TtVv F2 Genotypes are gotten by crossing the F1 genotypes (best to use fork line method) Genotypes F2: 1/16 TTVV, 1/16 TTvv, 1/8 TTVv, 1/16 ttVV, 1/16 ttvv, 1/8 ttVv, 1/8 TtVV, 1/8 Ttvv, 1/4 TtVv Didn't ask for the amount but you get the amount of each genotype when the fork line method is used.
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