According to the data from fruitflies, this gene Females, reared at 29°C: Homozygous methuselah mutants →Homozgyous normal flies 100 Survivorship (%) 80- 60- 40- 20- 0- 10 20 30 40 50 60 Age (days) Figure 13-14 Evolutionary Analysis, 4/ ©2007 Pearson Prentice Hall, Inc. Cumulative fertility (Adult progeny per female) 80- 70- 60- 50- 40- 30- 20- 10- 0- 0 10 20 30 40 50 Age (days) lengthens lifespan but also reduces fertility shortens lifespan but also increases fertility reduces both lifespan and fertility cannot be determined from the data provided lengthens both lifespan and fertility

According to the data from fruitflies, this gene Females, reared at 29°C: Homozygous methuselah mutants →Homozgyous normal flies 100 Survivorship (%) 80- 60- 40- 20- 0- 10 20 30 40 50 60 Age (days) Figure 13-14 Evolutionary Analysis, 4/ ©2007 Pearson Prentice Hall, Inc. Cumulative fertility (Adult progeny per female) 80- 70- 60- 50- 40- 30- 20- 10- 0- 0 10 20 30 40 50 Age (days) lengthens lifespan but also reduces fertility shortens lifespan but also increases fertility reduces both lifespan and fertility cannot be determined from the data provided lengthens both lifespan and fertility

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter11: Meiosis: The Cellular Basis Of Sexual Reproduction

Section: Chapter Questions

Problem 2ITD

See similar textbooks

Similar questions

In the fly speciation experiment described in class, Drosophila from a single culture was split into four isolated cultures, 2 raised on maltose food and two on starch food. After forty generations all possible crosses were done between maltose and starch flies and between the two starch populations. Flies from different food types had very low mating frequencies compared to flies from the same food type but flies from different starch populations only mated at a very slightly lower rate than flies from the same starch population. How would you interpret this finding? Group of answer choices A. allopatric speciation is more powerful than sympatric speciation B. flies are incapable of evolution C. drift causes divergence more rapidly than selection D. sympatric speciation is more powerful than allopatric speciation E. selection causes divergence more rapidly than drift
In a natural population of Drosophila melanogaster, thealcohol dehydrogenase gene has two alleles calledF (fast) and S (slow) with frequencies of Adh-F at 0.75and Adh-S at 0.25. In a sample of 480 flies from thispopulation, how many individuals of each genotypicclass would you expect to observe under Hardy–Weinberg equilibrium?
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.
You have collected and determined genotypes of 200 individuals from a population of thr fruit fly, Drosophila pseudoobscura. Your sequencing study revealed 20 individuals with genotype AA, 70 individuals with genotype Aa and 110 individuals with genotype aa. i) what are your theoretical expectations for the number of individuals with each genotype if the population is in Hardy-Weinberg equilibrium. ii) Based on the genotype counts observed, is there evidence that this population of fruit flies deviates from your theoretical expectations under Hardy-Weinberg equilibrium?
Wyckoff et al. (2000. Nature 403:304-309) have proposed that some human male reproductive-associated genes have evolved by natural selection and not by neutral evolution. Part of the DNA sequence results of their study is shown below. Which gene(s) did seem to evolve by natural selection? Note: dn = number of substitutions per non-synonymous (replacement) sites and ds = number of substitutions per synonymous (silent) sites. dn ds Acrosin-Trypsin 0.138 0.064 Protamine 1 0.133 0.046 SRY 0.055 0.090 Histone H1 (testicular) 0.055…
Two chromosome inversions are commonly found in populations ofDrosophila pseudoobscura: Standard (ST) and Arrowhead (AR). Whenthe flies are treated with the insecticide DDT, the genotypes for theseinversions exhibit overdominance, with the following fitnesses:Genotype FitnessST/ST 0.47ST/AR 1AR/AR 0.62What will the frequencies of ST and AR be after equilibrium has beenreached?
Assume you are studying development in two species of iguana. You determine that a certain gene, "SPN2" turns on and off at different times in the two different species. The difference in timing leads to a different body length between the two iguana species. This phenomenon is an example of which of the following terms? a. Punctuated Equilibrium b. Pleiotropy c. Gene duplication d. Heterochrony
Given the results of our calculations of inclusive fitness for male pied kingfishers (Ceryle rudis) (see Table 13.1), isn’t it maladaptive to be a delayer? Why aren’t there any completely sterile helper male pied kingfishers? Please don't write from any online source.
The abdomen length (in millimeters) was measured in 15 maleDrosophila, and the following data were obtained: 1.9, 2.4, 2.1,2.0, 2.2, 2.4, 1.7, 1.8, 2.0, 2.0, 2.3, 2.1, 1.6, 2.3, and 2.2. Calculatethe mean, standard deviation, and variance for this population ofmale fruit flies.
Enumerate and give at least 5 unique mechanisms employed by organisms in order to determine the sex of the offspring. In each case, give an example of a species which represent such a scheme of producing sex(y) descendants. Put reference Mechanism Example 1 2 3 4 5 What evolutionary forces drive the turnover of these sex determination mechanisms?
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…
A researcher sequences the Pitx1 gene in a population of 100 stickleback fish that is known to affect dorsal spine length. He finds that the gene is NOT in Hardy-Weinberg equilibrium. There is an excess of homozygotes compared to expected. He then sequences 5 more loci scattered across the genome (on different chromosomes) but finds that these other loci are all in HW equilibrium. (That is, there was no difference between observed and expected frequencies). What is the most reasonable conclusion concerning the Pitx1 gene?