You are studying the genetics of flower color in four different plant species. In each species, you cross pure-breeding lines to make F₁ plants, and then self the F1 plants to produce F2 progeny. The results are shown in the following table: Parents F₁ F₂ ratios Species 1 red x white all purple 9 purple : 3 red : 4 white 2 purple x purple all purple 15 purple : 1 white 3 red x blue all purple 9 purple : 3 blue : 3 red : 1 white 4 white x white all purple 9 purple : 7 white Using the pathway diagrams below, match each species with the pathway that would be consistent with the parental, F₁, and F₂ phenotypes shown.

Human Anatomy & Physiology (11th Edition)
11th Edition
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Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Species 1
Species 2
Species 3
Species 4
|||
III
pathway D
= pathway C
=
pathway A
pathway B
Transcribed Image Text:Dragged and dropped options on the right-hand side will be automatically saved. For keyboard navigation... SHOW MORE ✓ Species 1 Species 2 Species 3 Species 4 ||| III pathway D = pathway C = pathway A pathway B
You are studying the genetics of flower color in four different plant species. In each species, you cross pure-breeding lines to make
F₁ plants, and then self the F1 plants to produce F2 progeny. The results are shown in the following table:
Species
Parents
F₁
F₂ ratios
1 red x white all purple 9 purple : 3 red : 4 white
2 purple x purple all purple 15 purple : 1 white
3 red x blue all purple 9 purple : 3 blue : 3 red : 1 white
4 white x white all purple 9 purple : 7
white
Using the pathway diagrams below, match each species with the pathway that would be consistent with the parental, F₁, and F₂
phenotypes shown.
A.
B.
C.
D.
precursor 1
precursor 2
precursor 1
precursor 2
precursor
precursor
enzyme A
enzyme B
enzyme A
enzyme B
→→ blue pigment
enzyme A
→ red pigment
→ purple pigment
→ purple pigment
red
pigment
enzyme A purple
pigment
purple
color
enzyme B
enzyme B
purple
pigment
transport into
flower petals
Transcribed Image Text:You are studying the genetics of flower color in four different plant species. In each species, you cross pure-breeding lines to make F₁ plants, and then self the F1 plants to produce F2 progeny. The results are shown in the following table: Species Parents F₁ F₂ ratios 1 red x white all purple 9 purple : 3 red : 4 white 2 purple x purple all purple 15 purple : 1 white 3 red x blue all purple 9 purple : 3 blue : 3 red : 1 white 4 white x white all purple 9 purple : 7 white Using the pathway diagrams below, match each species with the pathway that would be consistent with the parental, F₁, and F₂ phenotypes shown. A. B. C. D. precursor 1 precursor 2 precursor 1 precursor 2 precursor precursor enzyme A enzyme B enzyme A enzyme B →→ blue pigment enzyme A → red pigment → purple pigment → purple pigment red pigment enzyme A purple pigment purple color enzyme B enzyme B purple pigment transport into flower petals
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