Bio 121 Campbell Biology Truman College
17th Edition
ISBN: 9781323670637
Author: Urry, Cain
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 21.5, Problem 4CC
WHAT IF? Ø In 2005, Icelandic scientists reported finding a large chromosomal inversion present in 20% of north- ern Europeans, and they noted that Icelandic women with this inversion had significantly more children than women without it. What would you expect to happen to the frequency of this inversion in the Icelandic population in future generations?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
For the purpose of the assignment, we will refer to XY individuals as male and XX individuals as
female.
In humans, colorblindness (b) is an example of an X-linked recessive trait. In this problem, a male with
colorblindness XbY marries a female who is not colorblind but is a carrier of the colorblindness allele
(XXb). Using a Punnett square, determine the genotypic and phenotypic probabilities (as
percentages) for their potential offspring. Give the percentages in numbers, without the percent
sign, for each genotype and phenotype.
Genotypes
XX
Xxb
xbxb
XY
xby
Phenotypes
Consider females (XX) individuals only. In the two questions below, I am asking for the % of females,
not % of all people.
What is the % of females who are not colorblind?
What is the% of females who are colorblind?
Now consider makes (XX) individuals only. In the two questions below, I am asking for the % of
Thx!
About 40% of Solomon Islanders carry a gene for blond hair, and yet only 5%–10% of these people actually have blond hair. Why is the number of people with blond hair only 5%–10% when so many people carry genes for blond hair?
The duck-billed platypus has a unique mechanism of sex determination: females have five pairs of X chromosomes (X1X1X2X2X3X3X4X4X5X5) and males have five pairs of X and Y chromosomes (X1Y1X2Y2X3Y3X4Y4X5Y5). Do you think each of the X and Y chromosome pairs in males assort independently of other X and Y pairs during meiosis? Why or why not?
How is the inheritance of X-linked traits different from the inheritance of autosomal traits? How is the inheritance of X-linked and autosomal traits similar? List as many differences and similarities as you can.
Chapter 21 Solutions
Bio 121 Campbell Biology Truman College
Ch. 21.1 - Describe the whole-genome shotgun approach.Ch. 21.2 - Prob. 1CCCh. 21.2 - Explain the advantage of the systems biology...Ch. 21.2 - MAKE CONNECTIONS The ENCODE pilot project found...Ch. 21.2 - MAKE CONNECTIONS In Concept 20.2, you learned...Ch. 21.3 - The best estimate is that the human genome...Ch. 21.3 - The Genomes Online Database (GOLD) Website of the...Ch. 21.3 - WHAT IF? What evolutionary processes might...Ch. 21.4 - Discuss the characteristics of mammalian genomes...Ch. 21.4 - VISUAL SKILLS Which of the three mechanisms...
Ch. 21.4 - Contrast the organizations of the rRNA gene family...Ch. 21.4 - MAKE CONNECTIONS Assign each DNA segment at the...Ch. 21.5 - Describe three examples of errors in cellular...Ch. 21.5 - Explain how multiple exons might have arisen in...Ch. 21.5 - What are three ways that transposable elements are...Ch. 21.5 - WHAT IF? In 2005, Icelandic scientists reported...Ch. 21 - How did the Human Genome Project result in more...Ch. 21 - What has been the most significant finding of the...Ch. 21 - Compare genome size, gene number, and gene density...Ch. 21 - Explain how the function of transposable elements...Ch. 21 - How could chromosomal rearrangements lead to the...Ch. 21 - What type of Information can be obtained by...Ch. 21 - Bioinformatics intludes all of the following...Ch. 21 - Homeotic genes (A) encode transcription factors...Ch. 21 - Prob. 3TYUCh. 21 - DRAW IT Below are the amino acid sequences(using...Ch. 21 - EVOLUTION CONNECTION Genes important in the...Ch. 21 - scientific inquiry The scientists mapping the SNPs...Ch. 21 - Prob. 7TYUCh. 21 - SYNTHESIZE YOUR KNOWLEDGE Insects have three...
Additional Science Textbook Solutions
Find more solutions based on key concepts
More than one choice may apply. Using the terms listed below, fill in the blank with the proper term. anterior ...
Essentials of Human Anatomy & Physiology (11th Edition)
CAUTION How can evolutionary fitness be estimated? a. Document how long individuals survive. b. Count the numbe...
Biological Science (6th Edition)
1. Genetics affects many aspects of our lives. Identify three ways genetics affects your life or the life of a ...
Genetic Analysis: An Integrated Approach (3rd Edition)
Visit this site (http://openstaxcollege.org/l/heartvalve) to observe an echocardiogram of actual heart valves o...
Anatomy & Physiology
Your bore cells, muscle cells, and skin cells look different because a. different kinds of genes are present in...
Campbell Essential Biology (7th Edition)
Knowledge Booster
Learn more about
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 a randomly mating laboratory population of Drosophila, 4% of the flies have black bodies, and 96% have brown bodies. Flies with brown bodies always have at least one parent with a brown body. What is the frequency of heterozygotes in this population? 0.04 0.16 0.08 0.32 The period gene of Drosophila melanogaster encodes for a stretch of Thr-Gly repeated in tandem. In natural populations, the three most common alleles encode for 17, 20 and 23 Thr-Gly repeats. The amplification by PCR of the allele encoding for 20 Thr-Gly repeats produces a fragment of 320 bp. Using the same set of primers, what is the size expected when amplifying the 17 Thr-Gly allele? 317 303 314 302 in a certain species of plant loci A, B and C have an additive effect on the colour of the flower. Alleles A, B, and C are dominant and alleles a, b and c are recessive. Knowing that a plant with genotype AAbbCc has a…arrow_forwardOne of the findings from Strickland et al. 2019, was that certain color morphs among Chelymorpha alternans beetles are more common at some field sites than they are at other sites. Strickland and colleagues used cross breeding experiments to investigate these patterns and found evidence that color variation was mainly due to Mendelian inheritance. In other species, geographic variation in coloration might not be due to Mendelian genetics. (a) What is another possible explanation for geographic variation in coloration? (b) What sort of experiment could you use to test this alternative explanation?arrow_forward1.) What happens to the genotypic frequencies from generation 1 to generation 5? 2.) What process is occurring when there is a change in genotypic frequencies over a long period of time? 3.) What would happen if it were more advantageous to be heterozygous (Ff)? Would there still be homozygous fish? Explain. 4.) What happens to the recessive genes over successive generations? Explain. 5.) Why doesn't the recessive gene disappear from the population?arrow_forward
- You were given 1000 fruit flies to start a new laboratory colony. Before starting to breed your fruit flies, you decided to determine their genetic make up. You counted approximately 360 fruit flies that have vestigial wings, a recessive trait. If you decide to remove all the fruit flies with vestigial wings and only breed the flies with normal wings, what is the approximate frequency of individuals with vestigial wings in the F1 generation? 0.09 0.16 0.25 O 0.36 O 0.14arrow_forwardAssume an ideal diploid population of size 2N=32 (Just like the Buri Drosophila drift experiment with 16 individuals, or 32 gene copies, every generation). a) What is the probability that a neutral allele present in exactly 16 copies will CHANGE BY FEWER than 2 copies in the next generation? Be sure you understand that this includes cases where the number of copies remains unchanged, as well as the cases (plural!) where the magnitude of change between generations is one. b) What is the ultimate probability of fixation for this allele by drift? c) In the same population, what is the probability that a neutral allele present in exactly 2 copies will change by fewer than 2 copies (same meaning as above) in the next generation? d) What is the ultimate probability of fixation for this allele by drift?arrow_forwardThe Genetics &IVF Institute developed its XSORT method to increase the probability of conceiving a girl. Among 574 women using that method, 525 had baby girls. Assuming that the method has no effect so that boys and girls are equally likely, find the probability of getting at least 525 girls among 574 babies. Does the result suggest that the XSORT method is effective ? Why? Or why not?arrow_forward
- The average thorax length in a Drosophila population is 1.01 mm.You want to practice selective breeding to make larger Drosophila. Todo so, you choose 10 parents (5 males and 5 females) of the followingsizes: 0.97, 0.99, 1.05, 1.06, 1.03, 1.21, 1.22, 1.17, 1.19, 1.20. Youmate them and then determine the thorax lengths of 30 offspring (halfmale and half female): 0.99, 1.15, 1.20, 1.33, 1.07, 1.11, 1.21, 0.94,1.07, 1.11, 1.20, 1.01, 1.02, 1.05, 1.21, 1.22, 1.03, 0.99, 1.20, 1.10,0.91, 0.94, 1.13, 1.14, 1.20, 0.89, 1.10, 1.04, 1.01, 1.26. Calculate therealized heritability of thorax length in this group of flies.arrow_forwardPlease answer fast Consider a laboratory population that consists entirely of individuals with the same“repulsion” double heterozygous (diploid) genotype, Ab/aB. Assume the rate ofrecombination between the “A” and “B” loci is c = 1/ 4 .a) What are r, s, t and u in this population? What is D?b) What are r, s, t and u after 1 generation of random breeding? What is D?c) What are r, s, t and u after 5 generations of random breeding? What is D?arrow_forwardI believe that the correct answer is: p^2+2pq+q^2=1 I just want to make sure that I am understanding the Hardy-Weinberg Equilibrium correctly.arrow_forward
- 3. 3 I bbtal) Let's take a ślightly different look at the blue-eyed Mary Plants again. To remind you, the populations are dimorphic for dark blotches on the leaves --- some plants have blotches, and others don't. You have already determined earlier in the semester that Blotched is the dominant allele for this trait (use p for the dominant allele), and blotchless (no dark blotches on leaves) is the recessive allele for this trait (use g for the recessive allele). Leaves were sampled from each individual in a population of these plants, representing population in its entirety. The results are shown below: Remember our Hardy-Weinberg formulas: p² + 2pq +q² = 1 and p + q =1. Based solely on the phenotypic information given in the figure above, determine the following information (round to 2 decimal nlaces, please): :de d£h: q = 2pq- 2pqs What percentage of the plants are homozygous for the dominant allele?arrow_forward# 3 e A = all of the dominant alleles for a particular trait in a specific population; a = all of the recessive alleles for a particular trait in a specific population In the following equations "A" is represented by "p"; "a" is represented by "q" Hardy Weinberg equations: Allele distributions in Generation 1: 36 homozygous dominant individuals 13 heterozygous individuals 1 homozygous recessive individual There are 50 individuals in this particular population. We want to see if allele distributions change from generation to generation. We will use the Hardy Weinberg equations to find out. p+q=1.0 (100% of the alleles for this trait in the population) Explanation of terminology: px p=p² 2 xpxq=2pq qxq=q² p² + 2pq+q² = 1.0 (Don't panic! You can do this!) Due to migration and random mating of the parent generation, the percentage of homozygous recessive genotypes in Generation 2 offspring increases, changing "a" to 40%, so a = .40 If "a" = .40, and "a"=q, then q = Remember that p+q=1.0 If…arrow_forwardPlease answer 1(a)If we have a population in which the chromosome is a combination of real numbers , how can we apply mutation and crossover? (b)Why approximate matching should be more tolerable within a certain range?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
QCE Biology: Introduction to Gene Expression; Author: Atomi;https://www.youtube.com/watch?v=a7hydUtCIJk;License: Standard YouTube License, CC-BY