Q: Galactosemia is a rare autosomal recessive disease that causes mental retardation. Individuals with…
A: In neutral mutations, the rate of mutation is equal to the rate of substitution. Mutations…
Q: Fitness is ,most corectly a technical term.what does it mean?what two things do you suppose govern…
A: Evolution is defined as the change in the genetic composition of a population during successive…
Q: What is the role of variation in evolution.if heterozygosity is reduced, what happens to the…
A: Evolution is the alteration in the organisms of a population at the gene level that over time leads…
Q: The results of new studies in population genetics that confirm a higher degree of genetic variation…
A: Africa is a country rich in genetic and linguistic diversity. The history of the genetic diversity…
Q: Effect of geographic distance from Africa on human genetic diversity - Why do humans have a low…
A: Genetic Diversity is the diversity of genetic characteristics expressed or recessive within a…
Q: Direction: Match the following terms in the other column. Write your answer on the space given.…
A: Answer
Q: In a given population, which of the following males would be considered to be the MOST…
A: Fitness in biology or specifically in population genetics describes that an organism can be…
Q: A particular character in diploid species is controlled by a gene which has three alleles in the…
A: Genotype is the gene complement or the genetic constitution of an individual with regard to the…
Q: The eugenic movement was created in the early 20th century by Sir Francis Galton. Its aim was to…
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: What is true when diploid populations are in Hardy-Weinberg equilibrium at a particular locus? The…
A: Hardy-Weinberg equilibrium states that in a population that must be large the allele frequency can…
Q: A diploid population has 456 individuals of genotype AA, 814 individuals with genotype Aa, and 208…
A: The equation associated with Hardy-Weinberg principle is: p2+q2+2pq=1 Here, “A” allele frequency can…
Q: When selection favors homozygotes over heterozygotes it is likely that... Incorrect answer - both…
A: Natural selection is a theory that states that organisms evolved by changing their heritable traits…
Q: Hello, I need help answering number 18(INCLUDING THE SUB-PARTS). Pls and thank you 18. A.) T / F…
A: Genetics is the study of genes, their interactions, and the effect of environment on genes. Broadly…
Q: A population genetic survey revealed that a small subpopulation of species X, and nowhere else, has…
A: The answer is True.
Q: There is a chromosome with two loci on it, Locus X that has alleles X and x, and Locus Y that has…
A: The linkage refers to the tendency of two genes to stay together during the formation of gametes.
Q: Snapdragon plants exhibit incomplete dominance in flower colour and this is controlled by a single…
A: The factors that induce changes in allele frequencies over time are natural selection, genetic…
Q: -Please explain the concept of coalescence no more than three sentences) - Why do we say that…
A: Genetic drift is a vital process that help to understand the process of evolution
Q: Most new mutations are detrimental, yet rare beneficial mutations canbe adaptive. With regard to the…
A: Mutations are nonrandom and no directional, sometimes mutations may be beneficial, but most of the…
Q: Calculate the observed frequencies of genotypes C"C* , C°C, and C'C' at Day 7. (The observed…
A: The Hardy-Weinberg equilibrium is a principle stating that the genetic variation in a population…
Q: Which of the following of the following quantities does not affect adaptive evolution* of a…
A: Importance of Z for population survival will definitely affect the genetic composition of upcoming…
Q: What is an allele?
A: According to guidelines we have to answer the first question only. so please kindly post the…
Q: Hardy-Weinberg Equilibrium Scenario In a population of beetles, the dominant shell color is black…
A: Black beetles= 956 Brown beetles = 1387-956= 431 Frequency of black beetles= number of black beetles…
Q: One of the original Amish colonies rose from a ship of colonists that came from Europe. The ship’s…
A: Extra toes or extra fingers in legs and hands respectively is called as polydactyly.
Q: A change in genetic composition of a population always means that adaptive evolution has occurred.…
A: Since you have asked multiple questions , we will solve the first question for you. If you want any…
Q: Recall that the Hardy-Weinberg model makes the following assumptions: No mutations Extremely large…
A: Introduction According to the Hardy-Weinberg equilibrium, if no unfavorable influences exist,…
Q: . Nowadays, newborn babies are required to be tested for phynylketonuria (PKU), an autosomal…
A: Hardy-Weinberg equilibrium (HWE) helps in identifying the relationship between the allele and the…
Q: An allele with no effect on fitness arises in a population through mutation and increases in…
A: *Natural selection is process in which populations of living organisms will adapt and changes which…
Q: About 7% of men in a population are red-green colour blind due to a sex-linked recessive gene.…
A: The dominant allele is marked by the letter p, and the recessive allele is denoted by the letter q.…
Q: Which of the following are true about the logic we use to identify alleles under positive selection…
A: 1)Alleles under positive selection occur at relatively high frequency. Positive frequency dependent…
Q: Hitchhikers thumb is a recessive trait. We'll use: H=non-hitchhikers thumb allele and h=hitchhikers…
A: A recessive allele is a variety of genetic code that does not create a phenotype if a dominant…
Q: Definitions of phenotype, genotype, allele, gene, microevolution, macroevolution
A: You have posted multiple questions . We have answered one . For rest solution post separately .
Q: Which of the following statements about evolution by genetic drift is correct? -The many…
A: Genetic drift is a condition that occurs in a finite population. Due to the prevalence of chance in…
Q: The culturally constructed concept of “race” holds little value in scientific biological contexts…
A:
Q: If a genetic disease reduces fertility and the allele that causes the disease offers no other…
A: Sickle Cell anaemia is a fatal disease which occurs when both the alleles are expressed in…
Q: "If the twin issue comes up in a number variants] that differ between the two twins that might help…
A: Monozygotic twins are twins that developed from a single zygote. The zygote splits into two equal…
Q: Color blindness in humans is caused by an X-linked recessive allele. Ten percent of the males of a…
A: Hardy-Weinberg equilibrium states that with no disturbances, the genetic variation or the…
Q: Which of the following are requirements for evolution by natural selection? I environmental…
A: Introduction :- Natural selection is the adaptation and modification of populations of living…
Q: Which of the following statements about genetic drift is correct?
A: Genetic drift is an evolutionary, mechanism in which the frequency of an existing allele changes due…
Q: Evolution determines the change in inherited traits over time to ensure survival. There are three…
A: According to this question, they are asking for the population percentage at 0 years. And they have…
Q: Which of the below is NOT a component of natural selection? Group of answer choices Differential…
A: Evolution is defined as the change in trait of species over a period of time. It is a long term…
Q: Which of the following violates the assumptions of the Hardy-Weinberg model? The population is…
A: The statement-Sexual selection exists within the population violates the assumptions of Hardy…
Q: 2. Polyploidy is the differential investment in gametes by different sexes (e.g., one sex invests…
A: According to our guideline we can answer only first question or first three subparts. So, upload the…
Q: Calculate the probability a new mutation, with one copy in the population, is lost by random genetic…
A: Probability of new mutation = 1/2N
Q: Different members of the same species are geographically isolated for many generations. What will…
A: When individuals of same species are geographically isolated for generations, they will go through…
Q: populations, such as the Japanese, be missing the F374 allele for lighter skin pigmentation? (Hint:…
A: Melanin is a brownish-black pigment which is responsible for tanned skin in sun-burnt people. High…
Q: Hardy Weinberg equilibrium in a population refers to Group of answer choices equal numbers of…
A: Hardy Weinberg principle is basically proposed so that it can be used to measure the frequency of…
Q: The Hardy-Weinberg equation Group of answer choices is the way we determine the length of a gene on…
A: Hardy Weinberg`s equation- p2 + 2pq + q2 = 1 and p+q =1 p = frequency of the dominant allele in…
Q: Fitness is, most correctly, a technical term. What does it mean? What two things do you suppose…
A: Evolution refers to a process of changes that occur in the heritable characters of living organisms…
Q: In a population, with time the frequency of some alleles/genotypes decreases" describes... Group of…
A: Evolution is defined as the change in characteristics of an organism over a period of time.
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.
The "balance" theory by Dobzhansky
|
-is a theory based on the idea that genetic diversity in a population is maintained by heterozygote superiority. |
||
|
-is a theory that predicts a low level of genetic diversity in a given population. |
||
|
-was proposed in contrast to the so-called "classical" theory which hypothesized that individuals in a given diploid population should mostly be carrying neutral mutations in their genomes. |
||
|
-has been confirmed by numerous modern-day population genetic surveys, demonstrating the important of neutral mutations and genetic drift. |
||
|
-All of the above |
Step by step
Solved in 2 steps
- The eugenic movement was created in the early 20th century by Sir Francis Galton. Its aim was to improve the genetic pool of the human population by selective breeding. One idea was to discourage individuals with Mendelian autosomal recessive diseases to have children. However, the fallacy of this idea is shown by the fact that recessive lethal alleles (that are never found in homozygosity) can persist in populations for hundreds to thousands of generations. Which one of the following statements best explains the persistence of those alleles in populations? There is heterozygote advantage in those populations. Recessive alleles keep being produced by mutation. Recessive alleles cannot be selected against when present in heterozygotes. Genetic drift keeps recessive alleles at a relative high frequency in populations. Consider the action of mutation and of genetic drift in a population. What do you expect genetic variation will be in a…You are studying an autosome trait. There are two alleles, one showing complete dominance over the other. In a population, 84% of the individuals show the dominant phenotype. Assuming that this population is under Hardy-Weinberg equilibrium, which of the following statement is TRUE? 36% of individuals have the homozygous dominant genotype. 40% of the alleles in the population is recessive. 16% of the alleles in the population is recessive. 60% of individuals have the dominant alleles.A hypothetical ancestral population (AABB) splits into two independent lineages. Mutations produce different new alleles fixed at each loci in each population (AAbb in one population, aaBb in the other). According to the Dobzhansky-Muller model, which genotype would not be viable if the F1 individuals were inviable? O aabb Aabb aaBB AABB AABb
- What is the role of variation in evolution.if heterozygosity is reduced, what happens to the potential for evolution. The phenotype and genotyoe of a population is due to a mosaic of random and directed processes. Some of these have to do with history , discuss the role of chance and directions in evolution and in determining the phenotype of a population.In sexually reproducing species, each individual begins life with DNA inherited from both parent organisms. , Apply this idea to what occurs when organisms of two species that have homologous chromosomes mate and produce ( F1 ) hybrid offspring. What percentage of the DNA in the F1 hybrids' chromosomes comes from each parent species? As the hybrids mate and produce F2 and later-generation hybrid offspring, describe how recombination and natural selection may affect whether the DNA in hybrid chromosomes is derived from one parent species or the other.In Africa we find albinism in around 1 in every 5,000 individuals. This is puzzling, because albinism may reduce survival, for instance due to increased risk of skin cancer. What evolutionary mechanism (natural selection, mutation, genetic drift, or gene flow) is a viable explanation for the consistent observation of a few children born with albinism each generation and why?
- Calculate the probability a new mutation, with one copy in the population, is lost by random genetic drift in the next generation for the following diploid populations: [a] N=5 [b] N=25 [c] N=1250A beneficial dominant mutation is expected to take fewer generations to reach high frequency than a beneficial recessive mutation at the same locus in the same population, assuming neither mutation is lost to genetic drift. True False Which of the following statements is true of recombination? Recombination reshuffles alleles between maternal and paternal chromosomes, but not does produce new alleles. Recombination can produce new alleles by crossing over between maternal and paternal chromosomes. Recombination is more likely between loci that are near each other on a chromosome. Recombination occurring between loci on non-homologous chromosomes results in linkage equilibrium. Recombination occurring between loci on non-homologous chromosomes results in linkage disequilibrium.Applying the Hardy-Weinberg equilibrium. In a population of flowers, the following color distribution was noted: 36% red (RR), 48% brown-red (Rr), and 16% fuschia (rr). What will be the distribution of genotypes in the next generation?
- Which of the following best describes a pair of homologous chromosomes? a- A pair of chromosomes that have the same alleles of the same genes arranged in the same order b- A pair of chromosomes that have the same genes, but arranged in a different order, and with potentially different alleles of some of the genes c- A pair of chromosomes that have different alleles of the same genes arranged in different order d- A pair of chromosomes that have the same genes in the same order, but possibly with different alleles of some of the genesFor the trichome selection experiment, the null hypothesis is that there will be no difference between the mean number of trichomes in the second generation compared to the parent generation. The following bar graph shows the data from the experiment, including error bars showing ± 2 standard deviations (a measure of variation for a group of data as a whole). Based on the data provided, do you reject or fail to reject the null hypothesis? Select the answer that most strongly supports your choice and correctly justifies the response. Based on the data provided, do you reject or fail to reject the null hypothesis? Select the answer that most strongly supports your choice and correctly justifies the response. A. Reject the null hypothesis, as variation, shown by the error bars, is greater after selection. B. Reject the null hypothesis, as there is no overlap between the means as shown by the error bars. C. Reject the null hypothesis, as the error bars for the two groups show…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…