Complete this sentence: The number of your genetic ancestors is [Select] the number of your actual ancestors. Due to recombination, the number of your genetic ancestors [Select] has decreased has stayed the same has increased Complete this sentence: The number of your genetic ancestors is [Select] lower than the same as higher than [Select] the number of recombination, the tors
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- My son, Declan, has a greater number of Neanderthal variants than either my husbandor myself. Explain how this is possible. a) Many good ideas in science ultimately turn out to be incorrect, and this has happenedseveral times in the history of genetics. In your own words, state one idea and explain what itsuggested in the history of genetics that turned out to be incorrect.Because all known living organisms share a common system for storing and utilizing genetic information, it would suggest: that all life forms on Earth share a common ancestor that the study of one organism’s genes may reveal principles that apply to other organisms thatgenesfromoneorganismcouldpossiblyfunctioninanotherorganism that all of the above ideas (1-4) are likelyPick 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.
- Human geneticists have found the Finnish populationto be very useful for studies of a variety of conditions.The population is small; Finns have extensive churchrecords documenting lineages; and few people havemigrated into Finland. The frequency of some recessive disorders is higher in the Finnish population thanelsewhere in the world, and diseases such as PKU andcystic fibrosis that are common elsewhere do not occur in the Finnish population.a. How would a population geneticist explain thesevariations in disease occurrence?b. The Finnish population is also a source ofinformation for the study of quantitative traits. Thegenetic basis of schizophrenia is one question that canbe explored in this population. What advantage(s) anddisadvantage(s) can you imagine for studying complex traits based on the Finnish population structure?What are molecular homologies used for ? Answe in simple termsThe total number of genes in human is far less than the previous estimate.Comment?
- Marcia saw an ad on television for ancestry DNA testingand thought, ”Why not?” She ordered a kit, swabbedher inner cheek, and returned the kit for analysis. Severalweeks later, she was surprised to learn that she was 17 percentNative American. An elderly great aunt confirmed that her mother’s family intermarried with members of Native American tribes in the Pacific Northwest in the early twentieth century. To investigate her maternal heritage, Marcia ordered a mitochondrial DNA (mtDNA) test, which confirmed her Native American ancestry. Based on these genetic results, she applied to several Native American tribes for enrollment as a tribal member. She was shocked when she was turned down. In discussions, tribal officials told her that DNA alone is not sufficient to define who is Native American. Tribal standards for enrollment vary, but usually cultural attributes such as knowledge of the language, customs, and history of the tribe are important considerations for enrollment decisions.…In one General Biology 2 class, there were 51% of the students whocould roll their tongue, having either genotype RR or Rr. What is thefrequency of the r allele?Tiny foxes live on the Channel Islands off the coastof Southern California; the adults weigh less than3 lbs. These so-called island foxes (Urocyon littoralis) derived from the mainland gray fox (Urocyoncinereoargenteus). Analysis of genome sequencesrevealed that unlike the mainland foxes, the foxeson a single island have shockingly little geneticdiversity.a. The genome of only one fox from each island wassequenced. How would the lack of genetic diversitybe evident in a single genome sequence?b. The populations of the foxes on each island aresmall. How might the low diversity have occurred?c. Why is low genetic diversity thought to lead tospecies extinction?d. Hypothesize as to why the Channel Island foxesare thriving without human assistance despite theirlack of genome sequence diversity
- Why are only inherited variations important in the evolutionary process? Explain your answer.Tay-Sachs is a recessive lethal disease in which thereis neurological deterioration early in life. This diseaseis rare in the population overall but is found at relatively high frequency in Ashkenazi Jews from EasternEurope. A woman whose maternal uncle had the disease is trying to determine the probability that sheand her husband could have an affected child. Her father does not come from a high-risk population. Herhusband’s sister died of the disease at an early age.a. Draw the pedigree of the individuals described.Include the genotypes where possible.b. Determine the probability that the couple’s firstchild will be affected.Natural selection predicts that two species that came from a common ancestor should have high degree of correlation in their genomes. what aspect (use) of correlation am I using when apply it for this purpose?