Some inbred strains of the weedy plant Arabidopsisthaliana flower early in the growing season, but otherstrains flower at later times. Four different Arabdiposisplants (1–4) were crossed, and the resulting progenywere tabulated as follows:Mating Progeny1 × 2 77 late : 81 early1 × 3 134 late1 × 4 93 late : 32 early2 × 3 111 late2 × 4 65 late : 61 early3 × 4 126 latea. Explain the genetic basis for the difference in flowering time. How do you know that among thisgroup of plants, the flowering time trait is influenced by the action of a single gene? Which alleleis dominant and which recessive?b. Ascribe genotypes to the four plants.c. What kinds of progeny would you expect if you allowed plants 1–4 to self-fertilize, and in what ratios?
Some inbred strains of the weedy plant Arabidopsis
thaliana flower early in the growing season, but other
strains flower at later times. Four different Arabdiposis
plants (1–4) were crossed, and the resulting progeny
were tabulated as follows:
Mating Progeny
1 × 2 77 late : 81 early
1 × 3 134 late
1 × 4 93 late : 32 early
2 × 3 111 late
2 × 4 65 late : 61 early
3 × 4 126 late
a. Explain the genetic basis for the difference in flowering time. How do you know that among this
group of plants, the flowering time trait is influenced by the action of a single gene? Which allele
is dominant and which recessive?
b. Ascribe genotypes to the four plants.
c. What kinds of progeny would you expect if you allowed plants 1–4 to self-fertilize, and in what ratios?
Trending now
This is a popular solution!
Step by step
Solved in 5 steps with 5 images
