Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 14, Problem 3IQ
A true-breeding tall, purple-flowered pea plant (TTPP) is crossed with a true-breeding dwarf, white-flowered plant (ttpp). Assume that the genes are on different chromosomes.
- a. What is the phenotype of the F1 generation?
- b. What is the genotype of the F1 generation?
- c. What four types of gametes are formed by F1 plants? _______
- d. Fill in the following Punnett square to show the offspring of the F2 generation. Shade each phenotype a different color so you can see the ratio of offspring.
- e. List the
phenotypes and ratios found in the F2 generation. - f. What is the ratio of tall plants to dwarf plants? _______ Of purple-flowered plants to white-flowered plants? _______
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Students have asked these similar questions
For the cross: PpAa x PpAa
P = purple flowers (Dominant)
p = white flowers
A = axial flowers (Dominant)
a = terminal flowers
a. What are the possible gamete classes that can form from these parents?
b. What are the expected offspring genotype classes and ratios/proportions/fractions which will result from the cross?
c. What are the expected offspring phenotype classes and ratios/proportions/fractions which will result from the cross?
2.
Predict ratios/proportions/fractions of genotypes and phenotypes of the following crosses.
T = tall stem t = dwarf stem
P = purple flowers p = white flowers
G = green pods g = yellow pods
A = axial flowers a = terminal flowers
R = round peas r = wrinkled seeds
A. ttPp x Ttpp
B. GgRr x ggRr
C. PpGg x ppgg
Two plants in a cross were each heterozygous for two gene pairs (AB /ab) whose loci are linked and
30 map units (mu) apart. (Recall that 1 mu is equal to 1% recombination between two genes.)
Assuming that crossing over occurs during the formation of both male and female gametes and
that the A and B alleles are dominant, determine the phenotypic ratio of their offspring.
Part E: What proportion of the offspring of two
plants (both (AB/ab ) will be A - B- if the genes are 30
mu apart?
Part F: What proportion of the offspring of two
plants (both (AB/ab)) will be A - bb if the genes are 30
mu apart?
Part G: What proportion of the offspring of two
plants (both (AB/ab)) will be aaB- If the genes are 30
mu apart?
Part H: What proportion of the offspring of two
plants (both (AB/ab)) will be aabb if the genes are 30
mu apart?
Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With respect to X chromosome alleles, how many different types of gametes can a male produce? b. If a female is homozygous for an allele on an X chromosome, how many types of gametes can she produce with respect to that allele? c. If a female is heterozygous for an X chromosome allele, how many types of gametes can she produce with respect to that allele?
Chapter 14 Solutions
Study Guide for Campbell Biology
Ch. 14 - Fill in the following diagram of a cross of...Ch. 14 - A tall pea plant is crossed with a recessive dwarf...Ch. 14 - A true-breeding tall, purple-flowered pea plant...Ch. 14 - a. In the following cross, what is the probability...Ch. 14 - Prob. 5IQCh. 14 - Consider an example in which the M/m gene (for...Ch. 14 - The height of spike weed is a result of polygenic...Ch. 14 - Consider the following pedigree for the trait...Ch. 14 - a. What is the probability that a mating between...Ch. 14 - If two prospective parents both have siblings who...
Ch. 14 - Prob. 1SYKCh. 14 - How many different types of gametes can be formed...Ch. 14 - Prob. 3SYKCh. 14 - _______ gene Description a. has no effect on...Ch. 14 - _________ allele Description a. has no effect on...Ch. 14 - Prob. 3TYKMCh. 14 - Prob. 4TYKMCh. 14 - __________ dominant allele Description a. has no...Ch. 14 - __________ recessive allele Description a. has no...Ch. 14 - __________ genotype Description a. has no effect...Ch. 14 - Prob. 8TYKMCh. 14 - Prob. 9TYKMCh. 14 - Prob. 10TYKMCh. 14 - Prob. 11TYKMCh. 14 - Prob. 12TYKMCh. 14 - According to Mendels law of segregation, a. there...Ch. 14 - The F2 generation a. has a phenotypic ratio of...Ch. 14 - A 1:1 phenotypic ratio in a testcross indicates...Ch. 14 - Which phase of meiosis is most directly related to...Ch. 14 - After obtaining two heads from two tosses of a...Ch. 14 - The probability of tossing three coins...Ch. 14 - The probability of tossing three coins...Ch. 14 - In the F2 of a dihybrid cross involving two...Ch. 14 - In guinea pigs, the brown coat color allele (B) is...Ch. 14 - A true-breeding dwarf corn plant with red ears is...Ch. 14 - Prob. 11TYKCh. 14 - Prob. 12TYKCh. 14 - Prob. 13TYKCh. 14 - In humans, earwax can be wet or dry. The form of...Ch. 14 - You have blood type B, your mother has blood type...Ch. 14 - Prob. 16TYKCh. 14 - Summer squash are either white or yellow. To get...Ch. 14 - Prob. 2GPCh. 14 - True-breeding tall red-flowered plants are crossed...Ch. 14 - Prob. 4GPCh. 14 - Prob. 5GPCh. 14 - Prob. 6GPCh. 14 - Prob. 7GPCh. 14 - Prob. 8GPCh. 14 - Prob. 9GPCh. 14 - Fur color in rabbits is determined by a single...Ch. 14 - Prob. 11GPCh. 14 - The ability to taste phenylthiocarbamide (PTC) is...Ch. 14 - Prob. 13GPCh. 14 - Prob. 14GPCh. 14 - Prob. 15GPCh. 14 - Prob. 16GPCh. 14 - Imagine that a newly discovered, recessively...Ch. 14 - In mice, black fur (B) is dominant to white (b)....
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