In the model plant Arabidopsis thaliana, the following alleles were used in a cross: T = presence of trichomes t = absence of trichomes D = tall plants d = dwarf plants W = waxy cuticle w = nonwaxy A = presence of purple anthocyanin pigment a = absence (white) The T/t and D/d loci are linked 26 m.u. apart on chromosome 1, whereas the W/w and A/a loci are linked 8 m.u. apart on chromosome 2. A pure-breeding double-homozygous recessive trichomeless nonwaxy plant is crossed with another pure-breeding double-homozygous recessive dwarf white plant. a. What will be the appearance of the F1? b. Sketch the chromosomes 1 and 2 of the parents and the F1, showing the arrangement of the alleles.c. If the F1 is testcrossed, what proportion of the progeny will have all four recessive phenotypes?
In the model plant Arabidopsis thaliana, the following
alleles were used in a cross:
T = presence of trichomes t = absence of trichomes
D = tall plants d = dwarf plants
W = waxy cuticle w = nonwaxy
A = presence of purple
anthocyanin pigment
a = absence (white)
The T/t and D/d loci are linked 26 m.u. apart on chromosome 1, whereas the W/w and A/a loci are linked 8 m.u.
apart on chromosome 2.
A pure-breeding double-homozygous recessive trichomeless nonwaxy plant is crossed with another pure-breeding
double-homozygous recessive dwarf white plant.
a. What will be the appearance of the F1?
b. Sketch the chromosomes 1 and 2 of the parents and
the F1, showing the arrangement of the alleles.c. If the F1 is testcrossed, what proportion of the
progeny will have all four recessive
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