The Human Family Tree” Video Questions 4. How did movement into other parts of the world influence our genotype (genetic characteristics) and phenotype (physical characteristics
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Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
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- #21 Answer the following questions about evolution. Number responses according to the questions (1-4). (short answers are fine) How can negative traits that don't show up until old age continue in populations? (Why aren't they eliminated through natural selection?) As part of answer, provide an example. Imagine a population of mice living in a grey, rocky environment. Some mice are grey and some are brown. If natural selection occurs in this population, what would someone expect to see if you returned in 100 mouse generations? Describe what someone see in terms of fur colors in the population. Imagine a population of mice living in a grey, rocky environment. Some mice are grey and some are brown. If mutations occur in this population, what could someone see if they returned in 100 mouse generations, that would tell them mutations had occurred? Describe what they would see in terms of fur colors in the population, and how it would be different from what they would see in #2. If…Answer one a b or c for each question Biology 100 31 A) Theoretically, how many amino acids would a protein contain if coded for by a gene with 1245 nucleotides? -OR- B) Theoretically, how many nucleotides would a gene contain if it codes for a protein composed of 650 amino acids? 32-33. In humans, freckles is a dominant trait and the absence of freckles is recessive. If a man heterozygous with freckles marries a woman without freckles, what are the genotype and phenotype frequencies you would expect in their children? 34-35 In pea plants, green pods are dominant over yellow pods. Two plants with green pods are crossed. All the offspring plants are counted and pod colors recorded. It is discovered that the F1 generation consists of 123 individuals, of which, 92 have been found to have green pods and 31 were found to have yellow pods. What is the genotype of the plants in the F1 generation with yellow pods? What are the most likely genotypes of the parent plants? Refer to the partial…Remember that understanding is explanations more than facts. Definitions of phenotype, genotype, allele, gene, microevolution, macroevolution Know that in humans, most of the genetic variation is observed within populations, and know why that is. Know the 4 processes of evolution (3 neutral + natural selection) Know that evolution isn't progressive and doesn't necessarily lead to more complexity Know that evolution can lead to traits that decrease survival (ex: sexual selection) Know that quantitative traits are generally influenced by (i) many genes, each having a small effect on the trait value; and (ii) the environment What is F1 like when you cross 2 homozygotic lines of peas of different colors? What is F2 like when you cross F1 individuals (remember what 9:3:3:1 is about) Know what genetic dominance is about Definitions of chromosome, nucleus, mitosis, meiosis, crossing over How many chromosomes in humans? How many pairs of chromosomes? Know and apply Hardy-Weinberg's equation…
- #21 Answer the following questions about evolution. Number responses according to the questions (1-4). How can negative traits that don't show up until old age continue in populations? (Why aren't they eliminated through natural selection?) As part of answer, provide an example. Imagine a population of mice living in a grey, rocky environment. Some mice are grey and some are brown. If natural selection occurs in this population, what would someone expect to see if you returned in 100 mouse generations? Describe what someone see in terms of fur colors in the population. Imagine a population of mice living in a grey, rocky environment. Some mice are grey and some are brown. If mutations occur in this population, what could someone see if they returned in 100 mouse generations, that would tell them mutations had occurred? Describe what they would see in terms of fur colors in the population, and how it would be different from what they would see in #2. If dark skin helps protect…Hello, please answer the following Biology question correctly based on the given answer choices. Please pick the correct "answer-letter" and explain your answer. Thank you. Biology Question: "In humans, widow's peak is dominant to a straight hairline, and free earlobes are dominant to attached earlobes. A couple who is heterozygous for both traits has kids. What is the probability that the first child will have a widow's peak hairline and attached earlobes?" Answer Choice Options: A - 1/16 B - 9/16 C - 1/4 D - 3/162020 Online Discussion B. Darwin's Theory Warm-Up Active Developing the Theory of Evolution WARM-UP What was Charles Darwin's contribution to the theory of evolution? O Charles Darwin was the first to express the belief that all living things are related. Charles Darwin believed that organisms had a goal to adapt and did so through the inheritance of acquired traits. Charles Darwin introduced the idea that organisms better adapted to their environment would tend to survive, reproduce, and increase in number. Charles Darwin developed the theory of population growth. DONE O Intro Activity DII 96 2, or go
- When is being genetically identical to the parent an advantage for organisms? Question options: When many offspring are needed in a short amount of time. When the environment is just like the one the parent lived in successfully. When no mates can be found. When the environment is changing and fast reproduction is needed. Sexual reproduction increases which of the following? Question options: Survival rates for all organisms The rate (speed) of evolution Mutations Genetic diversityDo mutations in body cells contribute to genetic variation? No, the causes of body cell mutations are outside the body and cannot alter DNA. Yes, these body cell mutations lead to mutations in the gametes. No, the mutations cannot be passed to offspring and only affect the individual. Yes, the mutations can be passed on to offspring and contribute to variation in the population. I think it is the 3rd answer because mutations in body cells can't be passed on and only stay with the individual. Please confirm.180- 170- Figure 1. For each of more than 200 human societies, the average height of the men is plotted against the average height of the women. The diagonal line shows where the points would fall if men and women were of equal height. From Rogers and Mukherjee (1992). 160- 150- 140- 140 150 160 170 180 Female stature (cm) tionry ysin.e 1. Briefly explain how the figure shows that human men and women are sexually dimorphic in height. Male stature (cm)
- WRITE DOWN SOME NOTES OR TAKE AWAYS ABOUT THIS MODEL. Model 3 – Random Genetic Drift This model is an adaptation of the classic experiment conducted by Peter Buri (1956), which documented genetic drift in laboratory populations of Drosophila. In the model, ten vials (populations) of flies are held at a constant population size and the proportions of a mutant allele are tracked over generations. The population size and the initial allele proportion can be manipulated.Hello! I have a biology multiple choice question. There are 4 answer choices, pick the correct answer choice. Question: Which of the following best defines heredity? A. the joining of sex cells to form the first cell of a new organism B. the cycle through which an organism grows from a young form to a matureform C. the technology that enables scientists to insert genetic information from oneorganism into another D. the passage of genetic instructions from one generation to the nextBackground: 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