In tomatoes, toothed leaves (C) is dominant to lobulated leaves (c) and purple s
ID: 144832 • Letter: I
Question
In tomatoes, toothed leaves (C) is dominant to lobulated leaves (c) and purple stems (P) is dominant to green stems (p). At the next intersection between two floors. Two pure plants are crossed (CCppx CCPP) and the F1 progeny intersect, we observe the following population of individuals in F2: 192 toothed leaves/purple stems; 64 toothed leaves/ green stems; 45 lobulated leaves/purple stems; 19 lobulated/green stems. Propose explaining the results and using Chi Square denies or accepts your hypothesis 4.Explanation / Answer
The toothed leaves (C) is dominant over lobulated leaves (c)
The Purple stem (P) is dominant over Green stem (p)
When CCpp (Toothed leaves/green stem) cross overs with ccPP (lobulated leaves/purple stem). The F1 generations are all CcPp (Toothed leaves/Purple stem).
A cross of this F1 CcPp X CcPp would give the following gametes
CP, Cp, cP, cp.
A cross between this gametes gives the following genotype and phenotype
CP
Cp
cP
cp
CP
CCPP
Toothed leaves/Purple stem
CCPp
Toothed leaves/
Purple stem
CcPP
Toothed leaves/purple stem
CcPp
Toothed leaves/purple stem
Cp
CCPp
Toothed leaves/purple stem
CCpp
Toothed leaves/Green stem
CcPp
Toothed leaves/purple stem
Ccpp
Toothed leaves/Green stem
cP
CcPP
Toothed leaves/purple stem
CcPp
Toothed leaves/purple stem
ccPP
Lobulated leaves/Purple stem
ccPp
Lobulated leaves/Purple stem
cp
CcPp
Toothed leaves/purple stem
Ccpp
Toothed leaves/green stem
ccPp
Lobulated leaves/Purple stem
ccpp
lobulated leaves/green stem
The phenotypic ration is 9:3:3:1
When comparing the results of the cross we obtained 192 Toothed leaves/purple stem, 64 Toothed leaves/green stem , 42 Lobulated leaves/purple stem,19 lobulated leaves/green stem.
This produces an approximate ratio of 10:3:2:1 (192, 64, 42, 19) plants.
CP
Cp
cP
cp
CP
CCPP
Toothed leaves/Purple stem
CCPp
Toothed leaves/
Purple stem
CcPP
Toothed leaves/purple stem
CcPp
Toothed leaves/purple stem
Cp
CCPp
Toothed leaves/purple stem
CCpp
Toothed leaves/Green stem
CcPp
Toothed leaves/purple stem
Ccpp
Toothed leaves/Green stem
cP
CcPP
Toothed leaves/purple stem
CcPp
Toothed leaves/purple stem
ccPP
Lobulated leaves/Purple stem
ccPp
Lobulated leaves/Purple stem
cp
CcPp
Toothed leaves/purple stem
Ccpp
Toothed leaves/green stem
ccPp
Lobulated leaves/Purple stem
ccpp
lobulated leaves/green stem
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