Genes A and B are linked. Individual plants homozygous for different combinations of these genes (AABB,...
Genes A and B are linked. Individual plants homozygous for different combinations of these genes (AABB, aabb, AAbb, aaBB) were crossed at random to produce F1 plants. The F1 plants were self pollinated to produce the F2. The F2 progeny from six of the F1 self pollinations are listed below.
Number of F2 plants in each phenotypic class
F1 Plant-------------------AB--------------- Ab --------------- aB----------------- ab
1 --------------------------0 ----------------98 ---------------- 0------------------ 32
2 ------------------------- 64 --------------10 -----------------8 ------------------18
3 ------------------------ 106 --------------34-----------------0 ------------------ 0
4 -------------------------- 0 -----------------0 ---------------104 ----------------36
5 ------------------------- 50 --------------- 25 ---------------23------------------2
6 ------------------------- 99 ---------------- 0 --------------- 31----------------- 0
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- Determine the genotype of the F1 that produced each
F2 population.
- Determine the genotype of the F1 that produced each
F2 population.
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- Calculate the recombination frequency between genes A and B.
Homework Answers
a. the genotype of each F1 that produced each F2 population.
Genetic mapping have limited accuracy because it is based on the assumption that crossing over occur at random along chromosomes. This assumption is only partly correct because crossovers occur with greater frequency at some points rather then at others.
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Genes A and B are linked. Individual plants homozygous for
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