I need help with these please help me Case #7: Skin Color Around the WorldAround the world, populations near to the equator and in areas of high altitude have darker skin(their skin produces more melanin). Populations at northern latitudes have lighter skin- their skinproduces less melanin.2.1. What forces of evolution are at work? Tick all that apply.MutationNatural SelectionGenetic DriftGene FlowSpecifically, how is natural selection involved?3.Explain how the forces of evolution shift allele frequencies in the population over time.Your answer should include all of the 'forces' of evolution that you identified as being employed(above). Put this information into a narrative to explain how new traits are introduced, howindividuals are selected (if present), and how alleles in the population shift over time. Case #3: Lactase PersistenceBeing able to digest lactose after the age of four is common / uncommon (circle one) aroundthe world. 77% of European Americans and 14% of African Americans have the LCT gene onChromosome 2, which codes to produce the enzyme lactase, which allows people to digestlactose in adulthood.2.1. What forces of evolution are at work? Tick all that apply.MutationNatural SelectionGenetic DriftGene FlowIs natural selection involved? If it is, then how, specifically is it operating?3.Explain how the forces of evolution shift allele frequencies in the population over time.Your answer should include all of the 'forces' of evolution that you identified as being employed(above). Put this information into a narrative to explain how new traits are introduced, howindividuals are selected (if present), and how alleles in the population shift over time.

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Around the world, populations near to the equator and in areas of high altitude have darker skin (their skin produces more melanin). Populations at northern latitudes have lighter skin- their skin produces less melanin. 2. 1. What forces of evolution are at work? Tick all that apply. Mutation Natural Selection Genetic Drift Gene Flow Specifically, how is natural selection involved? 3. Explain how the forces of evolution shift allele frequencies in the population over time. Your answer should include all of the 'forces' of evolution that you identified as being employed (above). Put this information into a narrative to explain how new traits are introduced, how individuals are selected (if present), and how alleles in the population shift over time.

Around the world, populations near to the equator and in areas of high altitude have darker skin (their skin produces more melanin). Populations at northern latitudes have lighter skin- their skin produces less melanin. 2. 1. What forces of evolution are at work? Tick all that apply. Mutation Natural Selection Genetic Drift Gene Flow Specifically, how is natural selection involved? 3. Explain how the forces of evolution shift allele frequencies in the population over time. Your answer should include all of the 'forces' of evolution that you identified as being employed (above). Put this information into a narrative to explain how new traits are introduced, how individuals are selected (if present), and how alleles in the population shift over time.

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter26: Human Evolution

Section: Chapter Questions

Problem 3DAA: Neanderthal Hair Color The MCIR gene regulates pigmentation in humans (Sections 14.1 and 15.l...

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Neanderthal Hair Color The MCIR gene regulates pigmentation in humans (Sections 14.1 and 15.l revisited), .so loss-of-function mutations in this gene affect hair and .skin color. A person with two mutated alleles for this gene makes more of the reddish melanin than the brownish melanin, resulting in red hair and pa le skin. DNA extracted from two Neanderthal fossils contains a mutated MC1R allele that has not yet been found in humans, To see how the. Neanderthal mutation affects the function of the MC1R gene, Carles Lalueza-Fox and her team introduced the allele into cultured monkey cells (FIGURE 26.1 6). FIGURE 26.16 MC1R activity in monkey cells transgenic for an unmutated MClR gene, the Neanderthal MC1R allele or the gene for green fluorescent protein (GFP). GFP is- not related to MC1R. 2. What does this imply about the mutations effect on Neanderthal hair color?
Neanderthal Hair Color The MCIR gene regulates pigmentation in humans (Sections 14.1 and 15.l revisited), .so loss-of-function mutations in this gene affect hair and .skin color. A person with two mutated alleles for this gene makes more of the reddish melanin than the brownish melanin, resulting in red hair and pa le skin. DNA extracted from two Neanderthal fossils contains a mutated MC1R allele that has not yet been found in humans, To see how the. Neanderthal mutation affects the function of the MC1R gene, Carles Lalueza-Fox and her team introduced the allele into cultured monkey cells (FIGURE 26.1 6). FIGURE 26.16 MC1R activity in monkey cells transgenic for an unmutated MClR gene, the Neanderthal MC1R allele or the gene for green fluorescent protein (GFP). GFP is- not related to MC1R. What purpose do the cells with the gene for green fluorescent protein serve in this experiment?
1-A common misconception of evolution is that it should naturally eliminate "harmful" alleles/mutations if they do not assist survival or reproduction. Explain why this is inaccurate and how these "harmful" mendelian alleles persist within the human genome. In your response, give an example of a mendelian allele that causes a "harmful" genetic disease that does not appear to have a beneficial component. 2 - Name an allele that is "harmful" in homozygote arrangements yet "beneficial" in heterozygote combinations (*hint: there is one really great example in the textbook!) 3 - Explain why removing variation (even rare forms) from the genome of a species makes it susceptible to extinction. 4 - Explain in your own words Mendel's two principles of inheritance (independent assortment and segregation).
Item 12 12 of 15 Part A A series of hybrid cell lines was created by somatic human-mouse somatic cell hybridization. Each cell line (numbers 7, 12, 17, 28, and 32) was examined for the presence of human chromosomes and for the ability to produce an enzyme. The fresults shown below were obtained. On the basis of these results, which human chromosome has the gene that encodes the enzyme? Human Chromosomes Present Cell Line 7 4 5 6 7 Enzyme production Yes 1 2 3 8 10 + + 12 Yes 17 Yes 28 No 32 + Yes chromosome 8 chromosome 5 chromosome 1 chromosome 4 chromosome 10 Submit Request Answer Provide Feedback Next
Question 6 Which of the following statements is true? 1 pt Not all inheritance patterns follow a strict dominant/recessive relationship Different inheritance patterns are explained by a variety of different molecular mechanisms O Geneticists want to understand both inheritance patterns and the underlying molecular mechanisms that make them happen All of the above
Human genetics 1In humans, widow's peak (W) is generally dominant to a straight hairline (w), and having a chin dimple is generally dominant (D) to not having a chin dimple (d).A man who is heterozygous for both widow's peak and chin dimples marries a woman who is also heterozygous for both traits. What is the phenotype of the woman? Group of answer choices 1. wwdd 2. WwDd 3. straight hairline and no chin dimple 4. widow's peak and chin dimple
Bikini Bottom Genetics Name Selentists at Bikini Bottoms have been investigating the genetic makeup of the organisms in this community. Use the Information provided and your knowledge of genetics to answer each question. 1. For each genotype below, indicate whether it is a heterozygous (He) OR homozygous (Ho). Ff bb TT- DD Bb dd Dd ff Tt BB. FF Which of the genotypes in #1 would be considered purebred? Which of the genotypes in #1 would be hybrids?. 2. Determine the phenotype for each genotype using the information provided about SpongeBob. Yellow body color is dominant to blue. Y, Yy yy Square shape is dominant to round. 3. For each phenotype, give the genotypes that are possible for Patrick. A tall head (T) is dominant to short (). Tall= Pink body color (P) is dominant to yellow (p). Short = Pink body =, Yellow body = 4. SpongeBob SquarePants recently met SpongeSusie Roundpants at a dance. SpongeBob is heterozygous for his square shape, but SpongeSusie is round. Create a Punnett…
Section I: Monohybrid Simple Mendelian Genetics The following question refer to the pedigree chart in the figure below for a family, some of whose members exhibit the dominant trait, W. Affected individuals are indicated by a dark square or circle. I III IV 1 ww 2 3 4 5 B. Ww 2 Ww B. 100% 6 2 3 1. What is the sex of the individual in II-3 AND does the person have the W trait? A. Female....yes C. Male.....yes B. Female.....no D. Male....no 8 2. What is the genotype of individual II-5 A. ww or Ww C. ww D. WW 3. What is the likelihood the progeny of IV-3 and IV-4 will have the trait? A. 0% C. 75% D. 50%
7:56 O 2 Done + Quiz 1 Punnett Square Scientists at Bikini Bottoms have been investigating the genetic makeup of the organisms in this community. | Use the information provided and your knowledge of genetics to answer each question. 1. For each genotype below, indicate whether it is a heterozygous (He) OR homozygous (Но). TT Bb DD Ff tt dd Dd ff Tt bb BB FF Which of the genotypes in #1 would be considered purebred? Which of the genotypes in #1 would be hybrids? | 2. Determine the phenotype for each genotype using the information provided about SpongeBob. Yellow body color is dominant to blue. Text editor Edit picture Fill Form Annotation
ntml 4 of 9 4. Huntington's disease affects the muscles and nervous system. People who hạve Huntington's'usually get the disease in their 30s. Which of the following is the most accurate statement? A. Huntington's disease could not be due to genetics because genes determine your inherited traits from birth and they do not change in your 30s. B. Huntington's disease could not be due to genetics because everyone's internal organs are the same. C. Huntington's disease could be due to genetics because a slight change in a gene you are born with produces an abnormal protein that eventually leads to a disease. D. Huntington's disease could be due to genetics because most diseases that affect the nervous system are due to genetics. Powered by Linklt!
Canavan Disease Canavan disease in an autosomal recessive disorder caused by mutations in the gene that codes for the enzyme aspartoacylase resulting in incomplete synthesis of myelin sheaths. Individuals affected by Canavan disease experience lack of motor development, abnormal muscle tone, and difficulty feeding. Most individuals affected by this disease die before the age of 10. In a particular population in Canada, researchers examined 250 people for Canavan disease and found that 45 of them had the disorder. a) What is the frequency of Canavan disease in the population examined by the researchers? Show all your work. Express your answer as a value between 0 and 1 rounded to two decimal places. b) What is the frequency of the Canavan disease carriers in the population examined by the researchers? Show all your work. Express your answer as a value between 0 and 1 rounded to two decimal places.
AaBbCcDdE AaBbCcDc AaBbC Normal No Spacing Heading 1 Head Activity 1. 3. Based on the following data which of the following would be considered: a. Recessive? b. Dominant? C. A weak loss-of-function mutation? d. A null mutation? e. A haploinsufficiency ? Data - Gene "B" is required for formation of body segments. A wild type fly had 3 body segments. BB (Homozygous dominant) Wild Type Bb (Heterozygous) bb (Homozygous recessive) Lacks all body segments 1 body segment Mutant 1 Wild Type Mutant 2 Wild Type 2 body segments Mutant 3 Wild Type Wild Type 2 body segments Activity 4 tv Ps X W 000 DII DD II