Question

44. Three recessive genes in the tomato plant produce an absence of anthocyanin pigment (a),
hairless plants (h), and jointless fruit stems (j). Among 3,000 progeny from a trihybrid F1 that
was testcrossed, the phenotypes in figure 5 below were observed. What is the linkage
arrangement of these three loci?
259 hairless 268 anthocyaninless, jointless, hairless
40 jointless, hairless 941 anthocyaninless, hairless
931 jointless 32 anthocyaninless
260 normal 269 anthocyaninless, jointless
a. h-a-j. b. a-h-j. c. a-j-h. d. j-h-a. e. two of these choices.
45. Three recessive genes in the tomato plant produce an absence of anthocyanin pigment (a),
hairless plants (h), and jointless fruit stems (j). Among 3,000 progeny from a trihybrid F1 that
was testcrossed, the phenotypes in figure 5 above were observed. If the parentals (P1) were
homozygous, which of the following could have been a parental?
a. anthocyaninless. b. jointless. c. anthocyaninless, jointless.
d. hairless, jointless. e. hairless.
46. Three recessive genes in the tomato plant produce an absence of anthocyanin pigment (a),
hairless plants (h), and jointless fruit stems (j). Among 3,000 progeny from a trihybrid F1 that
was testcrossed, the phenotypes in figure 5 above were observed. What is your best estimate of
the anthocyaninless-hairless distance?
a. 20.0. b. 35.2. c. 37.6. d. 40.0. e. 60.0.
47. Three recessive genes in the tomato plant produce an absence of anthocyanin pigment (a),
hairless plants (h), and jointless fruit stems (j). Among 3,000 progeny from a trihybrid F1 that
was testcrossed, the phenotypes in figure 5 above were observed. What is your best estimate of
the anthocyaninless-jointless distance?
a. 20.0. b. 35.2. c. 37.6. d. 40.0. e. 60.0.
48. Three recessive genes in the tomato plant produce an absence of anthocyanin pigment (a),
hairless plants (h), and jointless fruit stems (j). Among 3,000 progeny from a trihybrid F1 that
was testcrossed, the phenotypes in figure 5 were observed. What is your best estimate of the
hairless-jointless distance?
a. 20.0. b. 35.2. c. 37.6. d. 40.0. e. 60.0.
49. Three recessive genes in the tomato plant produce an absence of anthocyanin pigment (a),
hairless plants (h), and jointless fruit stems (j). Among 3,000 progeny from a trihybrid F1 that
was testcrossed, the phenotypes in figure 5 were observed. Approximately what is the coefficient
of coincidence?
a. 0.4 b. 0.5 c. 0.6 d. 1.8 e. irrelevant
how do you solve these problems explain please