Week 6 discussion

10) Two processes that take place within a cell are shown here. Which of these statements correctly identify the processes and their outcomes? Select ALL that apply.   A) Both processes increase genetic variation.     B) Both processes can produce new phenotypes in an organism.     C) Process II occurs randomly while process I is predictable.     D) Process I is beneficial to the organism while process II is detrimental.     E) Only process I can provide the basis for natural selection acting on phenotypes. Not Graded

1. Explain in 200 words how the Darwinian evolution can decrease or increase the frequency of an allele( or a more complex heritable trait, for that matter).

Hi! All of these are related to a single subject. I hope it includes the three subparts I'm allowed for. Thanks! Identify the structure, how and where are they similar? In stage 3, identify the structures that made the organisms different from each other? Can embryonic development be an evidence that evolution took place? Explain.

8) Each of the observations provides evidence that supports the idea of common ancestry and evolution.   Which one is from the field of molecular biology?   A) Mammals have two openings in the skull behind each eye socket, whereas reptiles and bird only have one opening.   B) DNA analysis shows that the DNA of Neanderthals is more similar to the DNA of non‑African humans than that of Africans.   C) Two closely related but distinct species of squirrels inhabit the north and south rims of the Grand Canyon.   D) The embryos of both birds and mammals divide in a radial cleavage pattern instead of a spiral cleavage pattern present in insects.

1. The first genetic test used a short DNA sequence that was closely linked to the Huntington’s locus. People taking the test were classified as to whether they had the DNA sequence that was linked to the Huntington’s disease. This method was 95% accurate. This means that 95% of the people who had the Huntington’s-linked DNA sequence actually inherited the Huntington allele. It also meant that 95% of the people who did not have the DNA sequence linked to the Huntington allele did not inherited the wild-type allele (not the Huntington allele).Why might this preliminary test not be as accurate as a gene test for the actual Huntington’s allele? Explain.

1. The phenotype and genotype of a population is due to a "mosaic" of random and directed processes whereby some have to do with history  and others related to adaption and other factors. Why is this so?

1. The first genetic test used a short DNA sequence that was closely linked to the Huntington’s locus. The linkage distance between the DNA sequence used in the test and the actual Huntington’ disease locus was 5%. a. In a large sample of the Venezuelan family (over 2,000 individuals), what percentage of people would inherit the DNA sequence but not the Huntington’s allele (i.e. be a false positive test for Huntington’s)? b. What percentage of that large Venezuelan family would not inherit the DNA sequence but would inherit the Huntington’s allele (i.e., be a false negative test for Huntington’s)?

1. Present possible evidences that genetic drift affect human population. Discuss this evidences comprehesively. Do not just copy from somewhere, I need evidences that shows that genetic drift has a role in human evolution. Thank you!

1. Relate phenotypic characteristic or outward appearance to the central dogma of biology.

5. The branch of genetics that studies the genetic variation within and between local populations of a   species is called   A Population genetics   B. Molecular genetics   C Classical genetics   D. Cytogenetics

2. What is the role of variation in evolution – if heterozygosity is reduced, what happens to the potential for evolution? The phenotype (and genotype) of a population is due to a "mosaic" of random and directed processes. Some of these have to do with history; some are related to adaptation, etc. As completely as possible, discuss the role of chance and direction in evolution and in determining the phenotype of a population.

Background: In class we did a project about m and m’s and there ability to evolve and natural selection. (Yes I know they can’t actually evolve it was just used as a example in class) however I can’t figure out this question. Occasionally a mutant may occur and produce a candy that is misshapen or Pointier or flatter than the rest. Often this proves to be a weakness, but a rare mutation may confer extra M&M durability. Other mutations in M&Ms could occur ( like ones that result in a new color). A mutant un you population represents a new _________. What goes in the blank

"evolution is an integrated process" and uses sickle-cell allele as an example. In just 2-3 sentences, trace the various factors that influence evolution based on this example. I just want to know how Darwin, Mendel, gene flow, genetic drift, mutation, recombination and even the environment serve to create evolution. Thank you.

Hello, I need help answering 3.a, b, & c questions. Pls and thank you  3. A.) Study of mutations reveals that: a.) mutations that lead to shortened proteins often have high negative selection coefficients b.) most mutations that affect fitnes are synonymous mutations c.) most non-synonymous mutations have positive selection coefficients d.) mutations that have major effects on the phenotype are the most common. B.) Natural selection during the final stage of allopatric speciation can cause:  a.) increased post-zygotic isolation in a hybrid zone b.) more gene flow to form a "hybrid swarm" c.) increased pre-zygotic isolation in a hybrid zone d.) negative assortive mating C.) Human hunting of wild animals, such as deer or bighorn sheep, usually: a.) leads to evolution in the same direction as that favored by natural selection in the non-hunted populations b.) causes males to have more extreme sexual characters (such as horn size) c.) creates artificial selection in a direction that…

Mary and her identical twin Jenny were told by their friends that even tho they are Identical twins that their DNA's are different.  Based on the information learnt in nature vs nurture explain if it is or  not true dispite being identical twins that Mary and Jenny have different DNA's

Genetic variation is evident. The variation in your community is simple evidence of understanding the basics of evolution. How does this imply the existence of evolution? Does this mean that some humans are more evolved than others?

1. Arrange the scrambled letters to form a term related to genetics. 2. After  you have formed the words, discuss briefly the new terms and give at least 1 example for each. ennamoidc plluitem leeasll peissaist helatll llaese dooceacminn

1.)The frequency of the R allele for round seeds in a certain population of 500 peas wasfound to be 0.45. How many of them were wrinkled? How many of them had the rr genotype? How many of them were round? 2.)In humans, a dominant allele controls the formation of a cleft chin, a Y-shaped fissurein the chin caused by an atypical bone formation in the mandible (this phenotypeis also known as a chin dimple). A survey of 1200 college students found that108 of them did not have a cleft chin. What was the frequency of heterozygotes inthat student population?