Biology: Science for Life with Physiology (5th Edition)
5th Edition
ISBN: 9780321922212
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 7, Problem 2GP
Summary Introduction
To describe:
The genotype and the
Introduction:
The genotype can be defined as the allelic combination present in an individual or an organism. The genotype is the representation of the genes present. The phenotype can be defined as the visible or observable trait or characteristics of the genotype.
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A purpled-flower plant (WW) is crossed with a white-flowered plant (ww). The F1 generation offspring are crossed with each other (selfing). Which of the following is the correct genotype of the F2 generation?
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C)Ww, Ww, Ww, Ww
D)WW, WW, ww, Ww
When one crosses two corn plants with green seedlings, the following progeny is
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O A) A-,B-
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O E) A and B answers
A white flower is crossed with a purple flower, and the offspring exhibit incomplete dominance.
A) What is the phenotypic ratio of the F1 generation offspring? What is the genotypic ratio
of the F1 generation offspring?
B) What is the phenotypic ratio of the F2 generation offspring? What is the genotypic ratio
of the F2 generation offspring?
Answer and work:
Chapter 7 Solutions
Biology: Science for Life with Physiology (5th Edition)
Ch. 7 - What is the relationship between genotype and...Ch. 7 - Prob. 2LTBCh. 7 - Prob. 3LTBCh. 7 - Prob. 4LTBCh. 7 - Prob. 5LTBCh. 7 - Scientists have recently developed a process by...Ch. 7 - What is the physical basis for the independent...Ch. 7 - Prob. 8LTBCh. 7 - Prob. 9LTBCh. 7 - Prob. 10LTB
Ch. 7 - Prob. 1GPCh. 7 - Prob. 2GPCh. 7 - Prob. 3GPCh. 7 - Prob. 4GPCh. 7 - Pfeiffer syndrome is a dominant genetic disease...Ch. 7 - Prob. 6GPCh. 7 - A cross between a pea plant that produces round...Ch. 7 - Prob. 8GPCh. 7 - The allele BRCA2 was identified in families with...Ch. 7 - Two parents both have brown eyes, but they have...Ch. 7 - Prob. 2AAATBCh. 7 - Prob. 3AAATBCh. 7 - Prob. 1CTSCh. 7 - Prob. 2CTSCh. 7 - Prob. 3CTS
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- In four o’clock(a type of flowering plant), red color flowers exhibit incomplete dominance over white; when both exist together, the flowers are pink a) in a cross between a red flower and a white one, what is the genotype of the offspring? b) what is the genotypes ratio of the F2 generation of two of the F1 from (a) are crossed?arrow_forwardIn snapdragons, red flower color (R) is incompletely dominant over white flower color (r). The hybrids or heterozygous plants (Rr) are pink in color. a) Show the genotype for a white flower and for a red flower. b) If a red-flowered plant is crossed with a white-flowered plant, what are the genotypes and phenotypes of the F1 generation plants? c) What genotypes and phenotypes will be produced in the F2 generation? d) How did the genotypic and phenotypic ratio compare to each other in this incomplete dominance cross? e) What would the phenotypic ratio have been if this had been complete dominance? f) What kind of offspring can be produced if a red-flowered plant is crossed with a pink-flowered plant? g) What kind of offspring is/are produced if a pink-flowered plant is crossed with a white-flowered plant?arrow_forwardAssume that the trihybrid cross AABBrr x aabbRR is made in a plant species. Assume that A and B are dominant alleles, but there is no dominance effect of alleles at the R locus. a) How many different gametes are possible in the F1generation? What are the genotypes of these gametes? b) What is the probability of the parental aabbRR genotype in the F2 progeny? c) What proportion of the F2 progeny would be expected to be homozygous for all three genes?arrow_forward
- How many distinct genotypes are produced from a self cross of of the “tetrahybrid” A/a; B/b; C/c; D/d?arrow_forwardWhat can explain the phenomenon where the same genotype might give rise to different phenotypes? A) pleiotropy B) penetrance and expressivity C) complete dominance D) codominance E) Incomplete dominance Explain each answer.arrow_forwardA different walnut rooster was crossed to a rose hen, and all the progeny were walnut. What are the possible genotypes of the parents?arrow_forward
- A heterozygous tall pea plant is crossed with a short pea plant. Choose the correct answer that shows the cross and the ratio of the offspring. A) Cross Tt x Tt, F: TT, Tt, Tt, tt; ratio 3:1B)Cross TT x Tt; F: TT, Tt- no rationC)Cross tt x tt; F:Tt onlyD)Cross TT x tt; F:TT, tt; ratio 1:1E) Cross Tt x tt; F: Tt, tt; ratio 1;1arrow_forwardIn humans, the allele for red-green color blindness is X-linked and recessive. An XY man with normal color vision marries a color-blind XX woman who gives birth to a XX color-blind daughter. A] What is the phenotype and genotype ratios possible for a child born to this couple. B] What is the probability that the second XX daughter of this same couple will also be color blind? C] What is the probability that the next child this couple produces together will be a color-blind XY son? D] What can you tell me about the first color-blind daughter born?arrow_forwardIn snails, the maternal gene influences the phenotype of the direction of snail coiling. If D is an allele that codes for right coiling, and d for left coiling, which of the following crosses would result to ALL LEFT COILING from the offspring produced? b) a) Dd female x dd male Dd female x Dd male c) dd female x dd male d) dd female x Dd male e) DD female x DD male f) DD female x Dd male dd female x DD male g) h) Dd female x DD male i) DD female x dd malearrow_forward
- Give genotypes for the parents and offspring in the P, F1, and F2 generations of cross 1 and cross 2.arrow_forwardWhat are the Results of Correns’s Mirabilis Crosses?arrow_forwardAn individual with genotype AaBbccDd is crossed to an individual with genotype aaBbCcDd. What is the probability that their first offspring will have genotype aabbCcDD? a) 1/64 b) 1/32 c) 1/16 d) 1/8 e) 1/4arrow_forward
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