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- 1. A new species of animal called the rekamriliob has been found in the wild. The lab you work in has been tasked with studying its genetics. So far, there have been 2 main phenotypes found in the wild. Through selective breeding, your lab has determined that the gene for purple color (P) is dominant to the gene for golden color (p). Another lab has determined that the thick limb trait is dominant to the thin limb variety. If you breed a purebred purple thick limbed rekamreliob male with a golden thin limbed female, you get 100% thick limed offspring that are purple in color. If you take two of these organisms and breed them together, please predict the following. Assume that rekameliobs lay an average of 32 eggs. The gametes produced if the genes are unlinked b. genes The expected numbers of the possible phenotype in the offspring with unlinked The gametes produced if the genes are linked (list all possibilities, and show which ones are the result of crossing over) d. List the…Give an example of a trait that may have evolved as a result of the handicap principle and explain your reasoning.36. The E gene in chickens affects feather colour. The dominant phenotype is black feathers, heterozygotes have blue feathers, and the recessive phenotype is white feathers. After surveying a large population of chickens that escaped from a farm many generations ago, 23% are black feathered, 14% are blue, and 63% are white. Which evolutionary force has most likely acted on the E gene? A. Heterozygote advantage. B. Selection against the dominant phenotype. C. Inbreeding. D. Blue feathered chickens have immigrated into the population. E. None, the population is in Hardy-Weinberg Equilibrium.
- 25., Snow geese (Chen caerulescens) come in two color types, white “snows” and “blues” with dark bodies. A single gene controls coloration, where the dark (“blue”) allele (D) is dominant. A population of 30,012 geese includes 9236 dark individuals. Genetic testing reveals that 7636 of the 9236 dark individuals are heterozygous (Dd). How many individuals are dd? 7636 13140 1600 207764. A mathematical model has been derived for selection against the homozygous recessive genotype. The following equation was obtained, where q is the frequency of the a allele, and s is the selection coefficient for the aa genotype (the selection coefficient for the AA and Aa genotypes is 0): q(1 – sq) 1- są If the selection coefficient is 0.3 and the initial frequency of the a allele is 0.8, what is the new frequency of the a allele after one generation of random mating?1. The electrophoresis gel below shows allozyme polymorphisms of the sevenless gene (Sev) from 16 individuals sampled from a Drosophila melanogaster population. Assume that all genotypes of Sev in the population were sampled. a. Please estimate the genotype frequencies and allele frequencies of this population. b. Please compute the heterozygosity (h) of this gene. %3D
- 9. (A) What would be the gene map for the following genes with known recombination frequencies? D and A is 5.1 cM, A and C is 15.8 cM, A and B is 7.8 cM, C and D is 10.7 cM, and C and B is 8.0 cM. While doing gene map, I figure it out that sequence of genes on gne is AD BC (B) Which two genes are the closest and which are the farthest? |1A. Fruit Flies and Genetics Research: Imagine you are working in a genetics lab with the fruit fly Drosophila melanogaster, a model organism for genetics research. You want to determine whether a trait you have discovered in fruit flies is dominant or recessive.• Explain how you would design an experiment to answer this question.• Predict what types of outcomes are possible. Which would indicate that the trait is dominant? Which would indicate that it is recessive? 1.B Model Genetic Organisms: Why are fruit flies considered a model genetic organism? Would humans fit this description?1. Fruit Flies and Genetics Research: Imagine you are working in a genetics lab with the fruit fly Drosophila melanogaster, a model organism for genetics research. You want to determine whether a trait you have discovered in fruit flies is dominant or recessive.• Explain how you would design an experiment to answer this question.• Predict what types of outcomes are possible. Which would indicate that the trait is dominant? Which would indicate that it is recessive?2. Model Genetic Organisms: Why are fruit flies considered a model genetic organism? Would humans fit this description?
- 1.) Scientists use PCR to check three calves born to the same cow for a gene sequence from hemoglobin. The sequence is unique to one of the three bulls (bull A, as opposed to bulls B and C) with which the cow has run during mating season. Connect the calves with their fathers as much as possible. Calf Has sequence? 1 No 2 No 3 YesStep 1 The branch of Biological Sciences that deals with the study of genome is known as Genomics. The genome is the complete set of genetic information present in an organism. As per the guidelines, the answers for the first 3 questions are being provided here. The student is requested to upload the remaining questions separately. Step 2 Question 1: GWAS or Genome-wide Association Study is a method for identifying the genes that are responsible for giving an organism its phenotype. This method is very useful because - • It provides information on the SNPs that need our attention in order to know about the genetic risk for a particular condition in an organism. • The SNP identification makes it possible to understand the mechanisms that might cause the genetic risk and also might provide a scope to clarify the differences between the alleles. • This method can find genomic variants that cause a particular trait or disease in an individual. GWAS can solve problems such as - Finding out…Smaug (The Chiefest and Greatest of Calamities, The Unassessably Wealthy, The Stupendous, etc.), is the dragon who lords over the Lonely Mountain in J.R.R. Tolkien's The Hobbit. He is described with the following phenotypes: Reddish-golden scales Batlike wings Fire breathing Let's assume the following inheritance models are true for the dragon phenotypes observed: Phenotype Scale Color Wing Shape Fire Breathing Alleles R¹ (Red scales), R² (Gold scales) X¹ (Bat-like, Dominant), Xi (Insect-like, Recessive) F (Fire breathing), f (unable to create fire) Inheritance Model Incomplete dominance X-linked allele Mendelian