1. What is speciation? 2. What is a “hybrid zone”? 3. What postzygotic barriers are often found in hybrid zones that result in a lack of species fusion? 4. What are the differences among the three possible outcomes for hybrids over time: reinforcement, fusion, and stability?

Q: 2. The bishop pine tree of central California (Pinus muricata), which produces pollen in April, is…

A: Isolation mechanisms are the phenomenon due to which the gametes of two species cannot fuse or in…

Q: 1. List three places outside of Africa where sickle-cell anemia is fairly common in the indigenous…

A: A population is described as a group of individuals of the same species living and interbreeding…

Q: Hybridization was not originally recognized as a mechanism of speciation by either Darwin or the…

A: Hybridization was not originally recognized as a mechanism of speciation by either Darwin or the…

Q: ap Do chromosome structure different in humans and their closest relative among the How can natural…

A: A chromosome is present in the nucleus and is made up of DNA. When the chromosomes are paired then…

Q: When a male sea horse mates with a female leafy sea dragon (a closely related species), they produce…

A: There are two types of isolation mechanism . These are :- A ) Pre Zygotic barrier  B ) Post Zygotic…

Q: Which of the following best supports the scientists' prediction that speciation will occur in the…

A: Speciation: Speciation is an evolutionary phenomenon, where reproductive isolation occurs in…

Q: Which of the following could result in a polyphenism? A mutation creates a deleterious version of an…

A: Polymorphism is heritable. It is the ability of object to take many forms. Polyphenism is a type of…

Q: If a geographic barrier is removed and the two reunited populations intermingle and breed, what…

A: Biological species concept by Ernst Mayr states that the species are group of interbreeding natural…

Q: Hybrid breakdown refers to which situation? Group of answer choices Two species can hybridize but…

A: When two organisms from different species are crossed to produce a offspring such an organism is…

Q: Which of the statements are true regarding hybridization? Select all that apply. Hybridization…

A: Hybridization is the process where organisms from two different species are mix or breed together.…

Q: Which of the following describes two species that exhibit a prezygotic mechanism of reproductive…

A: Prezygotic isolation prevents the fertilization of eggs. In this question, we have to select the…

Q: 8. Imagine that you collected individuals of a species of hydra and established six replicate…

A: Introduction The term "population" usually refers to the number of individuals living in a specific…

Q: Without genetic variation, some of the basic mechanisms of evolutionary change cannot operate. There…

A: In a population, species, or group of animals, genetic variance is the diversity or variability of…

Q: One explanation for the “stepped cline” in both gene frequencies and morphology is that B. bombina…

A: Hybrid zones are locations where hybrids between species, subspecies, or races are found.…

Q: Given that long wings (L) are dominant to short wings (I) , predict the phenotypic ratio in a cross…

A: This is a case of monohybrid cross because single trait is involved in this case.

Q: Why do the locations of hybrid zones change? Why would a hybrid zone appear where one formerly…

A: Hybrid zones are locations wherein hybrid offspring of two distinct taxa (species, subspecies, or…

Q: TRUE OR FALSE 1. The gametic incompatibility is an example of an extrinsic reproductive barrier…

A: Reproductive isolation is defined as a collection of mechanisms, behaviors, and physiological…

Q: 5a) It is generally considered that blue or purplish colored flowers attract bees as pollinators.…

A: a) Yes. Bees have good color vision to help them find flowers and the nectar and pollen they offer.…

Q: 2. You have a population of 100 lizards. 25 are homozygous dominant for the long tail gene, and 65…

A: According to the Hardy-Weinberg equilibrium, the frequencies of the alleles and genotypes in a…

Q: 2. What does NOT happen to the hybrid zone when gene flow is established? O Hybrids cease to form. O…

A: A hybrid zone is a geographic region where two populations of closely related species or subspecies…

Q: What are factors which causes two hybrid populations come back together? Reinforcement…

A: Speciation happens throughout a range of evolution. At the point when another species emerges, there…

Q: Whole genome duplication is important in speciation by hybridization because: It creates…

A: Whole genome duplication (WGD) is a process that results in the doubling of the genome. This means…

Q: You have a population in Hardy-Weinberg equilibrium for the Mand alleles. These alleles are…

A: To estimate the frequency of alleles in a population, we can use the Hardy-Weinberg…

Q: 3. You find a population of salamanders that previous researchers have shown is at Hardy-Weinberg…

A:

Q: 5- Which of the following examples suggested to Charles Darwin that hybridization between different…

A: The objective of the question is to identify the example that led Charles Darwin to conclude that…

Q: Members of two separate species mate and produce hybrid offspring that fail to thrive in the…

A: In biology, a hybrid is the outcome of sexual reproduction mixing the traits of different organisms…

Q: One hundred rabbits are introduced to a new environment. Fifty rabbits are brown and 50 are white.…

A: * Genetic drift refers to random fluctuations in frequencies of alleles from generation to…

Q: In Question 10p of Chapter 4, the genotype of parents of litters with the following phenotypes was…

A: The genotype of parents of litters are Bbdd and bbDd. The phenotypes of the litters are 4 brown (4…

Q: Do you think these different regional populations are different species that could only occasionally…

A: Introduction A population comprises all the organisms of a particular species in a particular…

Q: Rocky Mountain juniper (Juniperus scopulorum) and one-seeded juniper (J. monosperma) have…

A: The Rocky Mountain juniper (Juniperus scopulorum) and one-seeded juniper (J. monosperma) shows…

Q: dominant to mugh bark. You obtain a DNA sample of many trees, and find that of 486 different…

A: Hardy weinberg law says that the genotype frequency remain constant in a population if the external…

Q: Would it have made a difference if natural selection had acted on the dominant allele instead of the…

A: The natural section is a directional process that affects the frequency of genes in a population. It…

Q: Whole genome duplication is important in speciation by hybridization because:     It creates…

A: Whole genome duplication (WGD) is a process where an organism's entire genetic material or genome is…

Q: WHAT IF If M. cardinalis individuals that had the M. lewisii yup allele wereplanted in an area that…

A: A hybrid is an offspring resulting from combining the qualities of two organisms of different…

Q: What is the expected time to fixation in generations for a new mutation in a diploid population…

A: If a new mutation arises in a population of diploid organisms with a population size of 50 , the…

Q: What factors causes two hybrid populations to Separate What factors causes two hybrid populations…

A: Answer 1 : Reinforcement: Hybrids are less fit than either purebred species. The species continue to…

Q: 1. What is the percentage heterozygosity remaining in a bottlenecked population of 25 individuals…

A: Heterozygosity: it is a condition of having two different allele at a locus. Heterozygosity decrease…

Q: This figure shows what can happen when a population splits in two. Which of the following…

A: A hybrid zone refers to an area where members of different species mate and produce some offspring…

Q: Aside from the provided species concepts, if you are to MAKE YOUR OWN SPECIES CONCEPT, how would you…

A: Species is collection of individuals having same traits that are capable of breed do as to give rise…

Q: What are factors which causes two hybrid populations not to change? Reinforcement Fusion Stability

A: Hybrids are the offspring of parents that have genetically defined qualities that differ from one…

Q: estions . Do chromosome structure different in humans and their closest relative among th How can…

A: It is believed that chimpanzees and humans are related species. They have comparable genetic and…

Q: the savannahs of the Amazon different species of the genus Ipomoea are pollinated by either…

A: Postzygotic isolation occurs when the mating between the members of two different species produces a…

Q: 12. An allele occurs at a frequency of 0.19 in a population. Assuming it is neutral to selection,…

A: To calculate the allele frequency, divide the number of times the allele of interest is observed in…

Q: 6 Create a concept map using the following terms/concepts: sympatric speciation, polyploid…

A: Concept mapping is a diagrammatic representation of information that includes concepts and the…

Q: A vestigial trait in species A is a trait that is functional in a closely related species B, but…

A: A vestigial trait is that kind of a trait that has partially or fully lost its functionality over…

Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.