Wild harebells have blue flowers. Two strains of harebells carry recessive alleles that give the plants...
Wild harebells have blue flowers. Two strains of harebells carry recessive alleles that give the plants white flowers.
a. Describe a cross to determine whether the white-flower causing alleles in these two strains are variants of the same gene or different genes, and the progeny phenotypes you expect to find in each case.
b. You results from the cross above indicate that the two strains carry alleles at different genes. What phenotypic ratio do you expect to find among the F2 progeny of a cross between parents of the two strains?
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Wild harebells have blue flowers. Two strains of harebells carry
recessive alleles that give the plants...
A horticulturist sought to test the hypothesis that flower bolor in the plant blue-eyed Mary Collins...
A horticulturist sought to test the hypothesis that flower bolor in the plant blue-eyed Mary Collins parviflorais controlled by a single gone locus where paired alles have a dominant-recessive relationship. The horticulturist crossed two plants that produced flowers of different colors, white and magenta, which he believed were true breeding The horticulturist observed that all of the plants resulting from his cross produced blue flowers. When the horticulturist crossed the F1 plants with each other he obtained the following F2...
BR In harebells, wild type flower colour is blue. You have found three white petalled mutants...
BR In harebells, wild type flower colour is blue. You have found three white petalled mutants which are homozygous pure breeding strains. When you cross each of these with a wild type pure breeding strain, all the offspring have blue flowers, and the F2 gives a 3:1 ratio of blue to white. When you cross two of the white mutants together, the Fl generation are all blue! When you self the FI, the F2 generation gives a ratio of 9...
You have identified a new species of flowering plant with red flowers instead of the usual blue flowers. You performed a cross and found that all of the F1 plants had purple flowers. When you self-fer...
You have identified a new species of flowering plant with red flowers instead of the usual blue flowers. You performed a cross and found that all of the F1 plants had purple flowers. When you self-fertilized these F1 plants, the resulting F2 was: Blue flowers: 1034 Purple flowers: 297 Red flowers: 94 What would the expected numbers be if these phenotypes were due to two alleles with incomplete dominance at a single loci? What if these phenotypes were due to...
In sweet peas, two genes (genes A and B) control flower color. The dominant alleles of...
In sweet peas, two genes (genes A and B) control flower color. The dominant alleles of both genes produce enzymes that function in the biochemical pathway shown to convert colorless precursors to a purple pigment. The recessive alleles do not produce enzyme. Therefore, at least one dominant allele of both gene A and gene B are required for purple flowers. Answer the questions about this biochemical pathway. ΑΑ, Αα BB, Bb Enzyme A Enzyme B Colorless precursor 1 Colorless precursor...
46. (7 points) Vanessa has obtained two true-breeding strains of mice, each homozygous for an independently...
46. (7 points) Vanessa has obtained two true-breeding strains of
mice, each homozygous for an
independently discovered recessive mutation that prevents the
formation of hair on the body.
One of the mutant strains is called naked, and the other mutation
strain is called hairless. To
determine whether the two mutations are simply alleles for the same
gene, Vanessa crosses
naked and hairless mice with each other (cross 1). All the
offspring are phenotypically wild-
type.
A) What is the most...
How many different combinations of alleles are possible among the gametes produced by an individual that...
How many different combinations of alleles are possible among the gametes produced by an individual that is heterozygous for 5 separate (unlinked) genes? five ten sixteen thirty- two Consider a pea plant heterozygous for two dichotomous traits. flower color: PP and P_p = purple flowers; pp = white flowers. seed shape: RR and Rr = round seeds; rr = wrinkled seeds. A self-hybridizing dihybrid plant (PpRr x PpRr) generates F2 seeds that can be planted to grow into plants (di-hybrid...
(1) The hardy geranium, Geranium lanuginosum, is native to the Himalayas and is widely cultivated due...
(1) The hardy geranium, Geranium lanuginosum, is native to the Himalayas and is widely cultivated due to its brilliant blue flowers, but flowers can be dark blue, light blue, speckled blue, and white. You have identified 2 genes involved in flower color. The alabaster gene catalyzes the conversion of a colorless precursor into a light blue pigment. The amount of pigment that is produced is determined by the number of functional copies of the alabaster gene. Normally, the pigment is...
this is all i have sorry 3A. The petals of the cornflower are normally blue. Two...
this is all i have sorry
3A. The petals of the cornflower are normally blue. Two pure-breeding lines were obtained from color variants found in nature; the first line had pink petals, and the second line had white petals. The following crosses were made between pure lines, with the results shown: Parents blue x white blue x pink pink x white blue blue blue 101 blue, 33 white 192 blue, 63 pink 272 blue, 121 white, 89 pink a. How...
25. A cross is made between two different true-breeding strains of daylilies, both of which have...
25. A cross is made between two different true-breeding strains of daylilies, both of which have white flowers. All of the F1 generation plants have yellow flowers. When an F, offspring is crossed with either one of the parental strains, half of the offspring have yellow flowers and half of them have white flowers. Propose an explanation for this outcome. In your answer, you should describe the genotypes of the two parental strains and the F1 offspring, and also explain...
1. The presence of short hairs on the leaves of tomato plants is a dominant trait...
1. The presence of short hairs on the leaves of tomato plants is a dominant trait controlled by the allele H.The corresponding recessive trait, smooth leaf, is found in plants with the genotype hh. The table below shows the progeny of three independent crosses of parental plants with genotypes and phenotypes that are unknown. Number of Progeny Hairy Leaf Smooth Leaf Cross 1: Cross 2: Cross 3: 32 42 45 24 Examine the distributions of phenotypes in the progeny of...
A horticulturist sought to test the hypothesis that flower bolor in the plant blue-eyed Mary Collins parviflorais controlled by a single gone locus where paired alles have a dominant-recessive relationship. The horticulturist crossed two plants that produced flowers of different colors, white and magenta, which he believed were true breeding The horticulturist observed that all of the plants resulting from his cross produced blue flowers. When the horticulturist crossed the F1 plants with each other he obtained the following F2...
BR In harebells, wild type flower colour is blue. You have found three white petalled mutants which are homozygous pure breeding strains. When you cross each of these with a wild type pure breeding strain, all the offspring have blue flowers, and the F2 gives a 3:1 ratio of blue to white. When you cross two of the white mutants together, the Fl generation are all blue! When you self the FI, the F2 generation gives a ratio of 9...
In sweet peas, two genes (genes A and B) control flower color. The dominant alleles of both genes produce enzymes that function in the biochemical pathway shown to convert colorless precursors to a purple pigment. The recessive alleles do not produce enzyme. Therefore, at least one dominant allele of both gene A and gene B are required for purple flowers. Answer the questions about this biochemical pathway. ΑΑ, Αα BB, Bb Enzyme A Enzyme B Colorless precursor 1 Colorless precursor...
46. (7 points) Vanessa has obtained two true-breeding strains of
mice, each homozygous for an
independently discovered recessive mutation that prevents the
formation of hair on the body.
One of the mutant strains is called naked, and the other mutation
strain is called hairless. To
determine whether the two mutations are simply alleles for the same
gene, Vanessa crosses
naked and hairless mice with each other (cross 1). All the
offspring are phenotypically wild-
type.
A) What is the most...
How many different combinations of alleles are possible among the gametes produced by an individual that is heterozygous for 5 separate (unlinked) genes? five ten sixteen thirty- two Consider a pea plant heterozygous for two dichotomous traits. flower color: PP and P_p = purple flowers; pp = white flowers. seed shape: RR and Rr = round seeds; rr = wrinkled seeds. A self-hybridizing dihybrid plant (PpRr x PpRr) generates F2 seeds that can be planted to grow into plants (di-hybrid...
(1) The hardy geranium, Geranium lanuginosum, is native to the Himalayas and is widely cultivated due to its brilliant blue flowers, but flowers can be dark blue, light blue, speckled blue, and white. You have identified 2 genes involved in flower color. The alabaster gene catalyzes the conversion of a colorless precursor into a light blue pigment. The amount of pigment that is produced is determined by the number of functional copies of the alabaster gene. Normally, the pigment is...
this is all i have sorry
3A. The petals of the cornflower are normally blue. Two pure-breeding lines were obtained from color variants found in nature; the first line had pink petals, and the second line had white petals. The following crosses were made between pure lines, with the results shown: Parents blue x white blue x pink pink x white blue blue blue 101 blue, 33 white 192 blue, 63 pink 272 blue, 121 white, 89 pink a. How...
25. A cross is made between two different true-breeding strains of daylilies, both of which have white flowers. All of the F1 generation plants have yellow flowers. When an F, offspring is crossed with either one of the parental strains, half of the offspring have yellow flowers and half of them have white flowers. Propose an explanation for this outcome. In your answer, you should describe the genotypes of the two parental strains and the F1 offspring, and also explain...
1. The presence of short hairs on the leaves of tomato plants is a dominant trait controlled by the allele H.The corresponding recessive trait, smooth leaf, is found in plants with the genotype hh. The table below shows the progeny of three independent crosses of parental plants with genotypes and phenotypes that are unknown. Number of Progeny Hairy Leaf Smooth Leaf Cross 1: Cross 2: Cross 3: 32 42 45 24 Examine the distributions of phenotypes in the progeny of...
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