Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 3, Problem 10QP
Crossing Pea Plants: Mendel’s Study of Single Traits
If you are informed that tune deafness is a heritable trait, and that a tune deaf couple is expecting a child, can you conclude that the child will be tune deaf?
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Solve this problem using the rules of probability instead of Punnet squares, bifurcation forks, or mental visualization.
Flower position, stem length, and seed shape were three of the traits that Mendel studied. Each is controlled by an independently assorting gene and has dominant and recessive expression as follows:
• Axial inflorescence (flowers originate along the stems) is dominant over terminal (flowers on top of the stem).
Long (“tall") stem is dominant over short stem (“dwarf").
• Round seed is dominant over wrinkled.
Let's use the symbols Fa/fa for genes determining axial vs. terminal (fa from "false umbel," a type of inflorescence); Le/le for tall vs. dwarf (le is for length); R/r for round vs. wrinkled seeds (the Latin word
rugosus means wrinkled).
Notice that the phenotype "tall plant" may be conferred by the genotype Lele or Lele; this can be abbreviated as Le-, where the dash represents the alternative allele. The homozygous lele will show the
recessive phenotype. Since…
Mendel's independent assortment: Draw a cell with a diploid chromosome number of 4. The gene controlling flower color (pink/white) is not linked to the gene for height (short/tall).
Draw the cells and chromosomes in the process of meiosis (meiosis I followed by meiosis II, not all individual stages) in a plant clearly heterozygous for both traits. Be sure your answer demonstrates your understanding of Mendel’s 2nd law of inheritance.
PLEASE HELP. This is all of the information.
Mendel examined two distinct flower phenotypes in his pea plants.
Flower color and flower position. The violet color (W) is dominant over the white
color (w), and the axial position (T) is dominant over terminal (t). Predict the F1
ratios of these phenotypes from a parent heterozygous for both traits and the
other parent homozygous recessive for both traits. Show your work.
Flower
color
Flower
position
violet/white
axial/terminal
Chapter 3 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 3.4 - Why do scientists design experiments to disprove...Ch. 3.4 - Should Ockhams razor be considered an irrefutable...Ch. 3.7 - Prob. 1EGCh. 3.7 - For most cases, a p value of 0.05 is used to...Ch. 3 - Prob. 1CSCh. 3 - Prob. 2CSCh. 3 - Prob. 3CSCh. 3 - Prob. 1QPCh. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...
Ch. 3 - Prob. 4QPCh. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Prob. 6QPCh. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - Crossing Pea Plants: Mendels Study of Single...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - Prob. 14QPCh. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - Prob. 17QPCh. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - More Crosses with Pea Plants: The Principle of...Ch. 3 - Meiosis Explains Mendels Results: Genes Are on...Ch. 3 - Meiosis Explains Mendels Results: Genes Are on...Ch. 3 - Meiosis Explains Mendels Results: Genes Are on...Ch. 3 - Prob. 26QPCh. 3 - Prob. 27QPCh. 3 - Variations on a Theme by Mendel A characteristic...Ch. 3 - Prob. 29QPCh. 3 - Variations on a Theme by Mendel Pea plants usually...Ch. 3 - Prob. 31QPCh. 3 - Prob. 32QPCh. 3 - Prob. 33QPCh. 3 - Prob. 34QPCh. 3 - Prob. 35QPCh. 3 - Prob. 36QP
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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
- Crossing Pea Plants: Mendels Study of Single Traits Stem length in pea plants is controlled by a single gene. Consider the cross of a true-breeding long-stemmed variety to a true-breeding short-stemmed variety in which long stems are completely dominant. a. If 120 F1 plants are examined, how many plants are expected to be long stemmed? Short stemmed? b. Assign genotypes to both P1 varieties and to all phenotypes listed in (a). c. A long-stemmed F1 plant is self-crossed. Of 300 F2 plants, how many should be long stemmed? Short stemmed? d. For the F2 plants mentioned in (c), what is the expected genotypic ratio?arrow_forwardCrossing Pea Plants: Mendels Study of Single Traits Of the following, which are phenotypes and which are genotypes? a. Aa b. tall plants c. BB d. abnormal cell shape e. AaBbarrow_forwardMendel's principle of segregation [Select] [Select] demonstrates why a pea plant can be tall with round seeds or short with round seeds * Previous demonstrates that offspring get one copy of each chromosome from each parent demonstrates that the inheritance of one trait can affect the inheritance of another trait. even when they're on different chromosomes demonstrates that when populations are segregated they are more likely to evolve quicklyarrow_forward
- Mendel is growing flowers. Pure red flowers have a pair of R genes. Pure whiteflowers have a pair of w genes. Red is dominant to white.(a) Write the Punnett square with a pure red parent cross-fertilized with a pure white parent.(b) Write a second Punnett square of the offspring of the preceeding question cross-fertilizedwith a pure white flower.(c) What is the probability that a flower from the second fertilization is pure white? (Writethe probability as a fraction in reduced form.)arrow_forwardCrossing Pea Plants: Mendels Study of Single Traits Wet ear wax (W) is dominant over dry ear wax (w). a. A 3 : 1 phenotypic ratio of F1 progeny indicates that the parents are of what genotype? b. A 1 : 1 phenotypic ratio of F1 progeny indicates that the parents are of what genotype?arrow_forwardCrossing Pea Plants: Mendels Study of Single Traits Define Mendels Law of Segregation.arrow_forward
- Mendel performs a cross using a true-breeding pea plant with round, yellow seeds and a true- breeding pea plant with green, wrinkled seeds. What is the probability that offspring will have green, round seeds? Calculate the probability for the F1 and F2 generations.arrow_forwardCrossing Pea Plants: Mendels Study of Single Traits Suppose that organisms have the following genotypes. What types of gametes will these organisms produce, and in what proportions? a. Aa b. AA c. aaarrow_forwardMendelian Genetics F2 Cross: Yellow, Round x Green, Round GgWw x ggWW Character: Pea color & shape Use Punnett square and fork-line method to check the possible offspring. Show and interpret all the possible genotypes and phenotypes of the offspringsarrow_forward
- Can you give an example of trait in the plant that Mendel studied?arrow_forwardMendel's Eggs Predict the Inheritance Patterns of the offspring by observing the parent's Egg color. dominant to Pink (p). Egg 1: Looking at Egg 1 the Parents are homozygous Purple (PP) and Pink (pp). Purple (P) is Before opening the egg, predict the color of their 4 offspring. Prediction : Actual Offspring: Number and color of predicted offspring: Egg 2: Looking at Egg 2 the Parents are heterozygous (Pp) and are both Blue (P)Blue, p green Before opening the egg, predict the color of their 4 offspring. Prediction : Actual Offspring: Number and color of predicted offspring:arrow_forwardAnalysis of dihybrid crosses, such as seed shape and color, provided Mendel great insight into inheritance. Which of the following best describes the insight this provided Mendel? O by analyzing two characters simultaneously provided Mendel greater insight into emergent properties of science O by analyzing two characters simultaneously provided Mendel greater insight for his Law of Independent Assortment O by analyzing two characters simultaneously provided Mendel greater insight in crossing over and linked genes O by analyzing two characters simultaneously provided Mendel greater insight for his Law of Segregationarrow_forward
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