In the Chinese primrose, slate-colored flower (s) is recessive to blue flower (S
ID: 13617 • Letter: I
Question
In the Chinese primrose, slate-colored flower (s) is recessive to blue flower (S); red stigma (r) is recessive to green stigma (R); and long style (l) is recessive to short style (L). All three genes involved are on the same chromosome. The F1 of a cross between two true-breeding strains, when testcrossed, gave the following progeny:Testcross Phenotype Testcross Progeny
slate flower, green stigma, short style 95
slate flower, red stigma, short style 27
blue flower, red stigma, short style 977
slate flower, red stigma, long style 427
slate flower, green stigma, long style 960
blue flower, green stigma, long style 27
blue flower, green stigma, short style 402
blue flower, red stigma, long style 85
3. [1pt]
What are the genotypes of the two P1 parents that were crossed to yield the F1?
Use the letters A,B,C, etc to represent parental chromosomes as follows: A=LSR, B=LSr, C=LsR, D=Lsr, E=lSR, F=lSr, G=lsR, H=lsr. Indicate your answer as follows (note the space): BC X GH
Theyre true breeding so I assumed it would have to be AA and HH because true breeding has to be homozygous but evidently this is not the case. I'm just confused as to how to even start
Explanation / Answer
ANSWER :
THREE POINT CROSS
Parental srl /srl SLATE RED SHORT x SRL/SRL BLUE GREEN LONG