13. Imagine that a plant with red flowers is bred to one with white flowers and when they make fruits, the seeds are collected and grown into new plants. The new plants, when old enough, have only pink flowers. Which plants are the parental generation? Which are the first filial generation? If the pink-flowered plants are interbred with each other and the resulting seeds planted, what would that generation be called? 14. Assume the plants in Question 13 are like those in Figure 16-9. What is the genotype of the plants with red flowers? Those with white flowers? Those with pink flowers? When a plant with red flowers makes pollen grains, will they all carry the Rallele? Will any carry the r allele? Or will half have R and half have r? Will any of the pollen grains be Rr? Explain your answer. FIGURE 16-9 (A) A monohybrid cross analyzing the trait of flower color. Details are explained in the text. (B) The phenotypes of parents, gametes, and progeny. Red flowered White flowered Parental generation Parent plants RR rr Gametes R First filial (F1) generation F, plants Rr Rr Interbreeding of members of the first filial generation F, gametes R F, plants RR Rr r R rr Second filial (F2) generation Genotype ratio: 1 RR:2 Rr:1 rr Phenotype ratio: 1 Red:2 pink:1 white (B) Key: R = red flower, r= white flower (A)
13. Imagine that a plant with red flowers is bred to one with white flowers and when they make fruits, the seeds are collected and grown into new plants. The new plants, when old enough, have only pink flowers. Which plants are the parental generation? Which are the first filial generation? If the pink-flowered plants are interbred with each other and the resulting seeds planted, what would that generation be called? 14. Assume the plants in Question 13 are like those in Figure 16-9. What is the genotype of the plants with red flowers? Those with white flowers? Those with pink flowers? When a plant with red flowers makes pollen grains, will they all carry the Rallele? Will any carry the r allele? Or will half have R and half have r? Will any of the pollen grains be Rr? Explain your answer. FIGURE 16-9 (A) A monohybrid cross analyzing the trait of flower color. Details are explained in the text. (B) The phenotypes of parents, gametes, and progeny. Red flowered White flowered Parental generation Parent plants RR rr Gametes R First filial (F1) generation F, plants Rr Rr Interbreeding of members of the first filial generation F, gametes R F, plants RR Rr r R rr Second filial (F2) generation Genotype ratio: 1 RR:2 Rr:1 rr Phenotype ratio: 1 Red:2 pink:1 white (B) Key: R = red flower, r= white flower (A)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
In plants like those of Questions 13 and 14, with red, pink, and white flowers, does flower color show complete or incomplete dominance?
Transcribed Image Text:13. Imagine that a plant with red flowers is bred to one with
white flowers and when they make fruits, the seeds are
collected and grown into new plants. The new plants,
when old enough, have only pink flowers. Which plants
are the parental generation? Which are the first filial
generation? If the pink-flowered plants are interbred
with each other and the resulting seeds planted, what
would that generation be called?
14. Assume the plants in Question 13 are like those in
Figure 16-9. What is the genotype of the plants with
red flowers? Those with white flowers? Those with pink
flowers? When a plant with red flowers makes pollen
grains, will they all carry the Rallele? Will any carry the
r allele? Or will half have R and half have r? Will any of
the pollen grains be Rr? Explain your answer.
Transcribed Image Text:FIGURE 16-9 (A) A monohybrid cross
analyzing the trait of flower color. Details are
explained in the text. (B) The phenotypes of
parents, gametes, and progeny.
Red flowered
White flowered
Parental generation
Parent
plants
RR
rr
Gametes
R
First filial (F1) generation
F, plants
Rr
Rr
Interbreeding of members of
the first filial generation
F, gametes R
F, plants
RR
Rr
r R
rr
Second filial (F2)
generation
Genotype ratio: 1 RR:2 Rr:1 rr
Phenotype ratio: 1 Red:2 pink:1 white
(B)
Key: R = red flower, r= white flower
(A)
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