A population of beetles have 345 red-sided individuals and 707 tan-sided individuals. Assume that red is totally recessive. How many of the total population (1052) are heterozygous? Explain how you found this.
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- Hello, I need help answering 5c & 5d using the phylogeny below(letter (A) graph to the left). Pls and thank you! a) In the 1990s, when only mitochondrial DNA sequencing was available, geneticists claimed that there was no hybridization between humans (Homo sapiens) and Neanderthals (Homo neanderthalensis). Does the phylogeny shown above support the claim humans did not hybridize with Neanderthals in the past? How can you tell? b) Once nuclear DNA sequencing became fast and able to handle sequencing ancient DNA, living humans were found to have some Neanderthal genes. Is this finding clear evidence that some early modern humans did indeed hybridize with Neanderthals? Why? c) Did female H. sapiens hybridize with Neanderthal males to produce fertile offspring that then back-crossed with modern humans? What does the graph say about this? d) Did male H. sapiens hybridize with Neanderthal females that then back-crossed with modern humans? What does the graph say about this?…(I've asked this question twice, but still haven't gotten a clear answer. I'm still confused on this.) Lions and tigers are separate species. However, on rare occasions (especially in zoos) they have been known to mate and produce hybrid offspring (ligers & tigons!). Explain, with reference to the mechanisms of reproductive isolation, why they are separate species even though they can mate. (1-2 sentences) **Please answer in simple, easily understandable terms**In fruit flies, long wings (L) are dominant over short wings (l).In a population of 20 fruit flies, 5 have LL genotypes, 10 have Ll genotypes, and 5 have ll genotypes.Find the frequency ofa. long-winged fruit flies Answerb. short-winged fruit flies AnswerRecord your answer as a value between 0 and 1 rounded to two decimal places.
- The larvae of the fruit fly Drosophila melanogaster normally feedon rotting fruit, which may ferment and produce high concentrations ofalcohol. Douglas Cavener and Michael Clegg studied allelic frequenciesat the locus encoding alcohol dehydrogenase (Adh) in experimentalpopulations of D. melanogaster (D. R. Cavener and M. T. Clegg. 1981.Evolution 35:1–10). The experimental populations were establishedfrom wild-caught flies and were raised in cages in the laboratory. Twocontrol populations (C1 and C2) were raised on a standard cornmeal–molasses–agar diet. Two ethanol populations (E1 and E2) were raised ona cornmeal–molasses–agar diet to which was added 10% ethanol. Thefour populations were periodically sampled to determine the frequenciesof two alleles at the alcohol dehydrogenase locus, AdhS and AdhF. Thefrequencies of these alleles in the four populations are shown in theaccompanying graph. a. On the basis of these data, what conclusion might you draw about theevolutionary forces…Part 1 Monohybrid crosses 1. The following lists represent genotypes at imaginary genetic loci. In each case there may be one or more correct answers – list ALL correct answers a. Homozygous dominant Mm NN oo pp Qq RR b. Homozygous recessive Mm NN oo pp Qq RR c. Genotypes in which dominant allele must show Mm NN oo pp Qq RR d. Genotypes in which recessive allele must show Mm NN oo pp Qq RRn the savannahs of the Amazon different species of the genus Ipomoea are pollinated by either bumblebees or hummingbirds; lavender flowered I. marabaensis and red flowered I. cavalcantei. Which of the follwing data would support the suggestion of natural interspecific hybridization with weak postzygotic isolation? A. magenta flowered hybrids found in the wild were infertile and bidirectionally crossing with parental species B. magenta flowered hybrids found in the wild were preferentially pollinated by introduced honeybees rather than parental pollinators C. In the laboratory, offspring resulting from crosses between I. cavalcantei, I. marabaensis showed a mixture of parental floral characteristics D. In the laboratory, offspring resulting from crosses between I. cavalcantei, I. marabaensis and magenta flowered hybrid plants were autotropic and showed hybrid viability
- Pick any trait you like in any species of wild plant or animal. Thetrait must somehow vary among different members of the speciesNote: When picking a trait to answer this question, do not pick the trait of wing color in butterflies.A. Discuss all of the background information that you alreadyhave (from personal observations) regarding this trait.B. Propose a hypothesis that would explain the genetic variationwithin the species. For example, in the case of the butterflies,your hypothesis might be that the dark butterflies survive betterin dark forests and the light butterflies survive better in sunlitfields.C. Describe the experimental steps you would follow to test yourhypothesis.D. Describe the possible data you might collect.E. Interpret your data.PLEASE HELP!! A. Calculate the recessive allele frequency for both original and isolated populations. ___ B. The null hypothesis was that these flies would remain at H-W equilibrium once they were isolated. The researchers ran a chi square on them using 0.05 significance. C. What is the D.F. value= ___ D. What is the Critical Value from the probability table? ___ E. Null hypothesis accepted? ____1) Darwin's studies of Galapagos finches are well known in the study of evolution. These studies have been instrumental in helping us understand how new species evolved from pre-existing species. Which statement is true about the speciation of the Galapagos finches? A) The finches evolved traits to help them survive in different environments. B) The finches had different traits that influenced the environment in which they chose to live. C) Genetic variation occurred amongst the finches, giving some a genetic advantage in a changing environment, allowing them to better survive. D) Members of the original population evolved in such a way that it became impossible for individuals from the two new populations to interbreed. Not graded
- 1) Darwin's studies of Galapagos finches are well known in the study of evolution. These studies have been instrumental in helping us understand how new species evolved from pre-existing species. Which statement is true about the speciation of the Galapagos finches? A) The finches evolved traits to help them survive in different environments. B) The finches had different traits that influenced the environment in which they chose to live. C) Genetic variation occurred amongst the finches, giving some a genetic advantage in a changing environment, allowing them to better survive. D) Members of the original population evolved in such a way that it became impossible for individuals from the two new populations to interbreed.Walking through the forest, you find a large population of toadstools. From your extensive knowledge of the kingdom fungi, you know that the allele for being spotted (S) is dominant over the allele for being plain (s). In this population of 1007, you find 14 toadstools that are not spotted. What are the allele frequencies? In a different forest, you find a somewhat smaller population of 548. Through genetic testing, you determine that there are 308 homozygous spotted, 206 heterozygous, and 34 homozygous plain toadstools. Is this what you expected? Show your calculations. Use a chi-square test to determine your answer and report the Chi-square test statistic, degrees of freedom and p value.Figure is attached Please consider sexual selection operating on red-collared widowbirds assess the lowercase-Roman-numeral-labelled statements that appear immediately below; and click the uppercase-letter-labelled response that is presented below and conveys the most accurate information. i. The specimen depicted at the top in the figure represents the group in which individuals were manipulated experimentally, trimmed so that tail lengths were shortened substantially.ii. The specimen depicted at the bottom in the figure represents the group in which individuals were unmanipulated, left untrimmed.iii. Individuals in the group represented by the specimen at the bottom fared better in condition (measured as body mass relative to length) terms than did individuals in the group represented by the specimen at the top. iv. Individuals in the group represented by the specimen at the bottom spent more time flying and displaying to potential mates than did individuals in the group represented…