Describe two mechanisms that can decrease gene flowin sympatric populations, thereby making sympatricspeciation more likely to occur.

Q: how physical appearance band environmental factors can influence the increasing abundance of one…

A: The communities are never stable but they keep changing dynamically more or less regularly over time…

Q: Many species of birds choose their mates based on how brightly colored they are. If feather color is…

A: Hardy-Weinberg equilibrium has five major principles no mutations, random mating, large population…

Q: Which of these can induce phenotypic change to future generations of a population?

A: Answer :- Option (E) is correct. - The following are induce phenotypic change to future generations…

Q: Calculate the coefficient of inbreeding (F) for the individual in orange in the figure below and…

A: Calculation of coefficient of breeding in a pedigree.

Q: Calculate the dominant allele "B" frequency and the recessive allele frequency if the population has…

A: According to Hardy-Weinberg equation, p2+2pq+q2 =1 & p+q =1 Where, p2= genotype frequency of…

Q: Explain the mechanism of allopatric speciation and give an example.

A: Speciation can be defined as the evolutionary process by which populations will evolve to become the…

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: Explain in 3 or 2 paragraphs -Genetic drift vs Gene flow

A: Difference between genetic drift and gene flow :-

Q: In either a secondary or a primary hybrid zone, what do the graphs above indicate about the relative…

A: Cline is defined as the special measurable gradient in which one single trait or character of a…

Q: Are geographic barriers universal for all species? If not, name a geographic barrier that might…

A: No, Geographic barriers are not universal for all species.

Q: Distinguish between prezygotic and postzygotic isolating mechanisms, and provide an example of each.

A: Reproductive isolation is a type of mechanism which retains species from mating with others to form…

Q: Explain why the genetic diversity of small populations is threatenedby inbreeding, genetic drift,…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: If two species of holly (genus Ilex ) flower during different months, their gene pools may be kept…

A: Reproductive isolation mechanisms are present to avoid the mating of individuals of different…

Q: Negative assortative mating means that organisms choose mates that are ditferent from themselves. If…

A: Answer- Assortative mating is the sexual selection of mate which have similar phenotypes also called…

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: What are the common mechanisms in Sympatric speciation

A: Speciation is a term which describes the process in which new species forms from the existing…

Q: briefly explain why there is species variation?

A: Variation is the change in any amount, level, or condition. Genetic variation occurs in the genetic…

Q: What factors can support the long-term stability of a hybrid zone if theparent species live in…

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

Q: What would a study of both monozygotictwins raised together and monozygotictwins raised apart tell…

A: Twins can be either monozygotic or dizygotic. In the case of monozygotic twins, they are formed due…

Q: Explain the disruptive selection effects on the phenotypic mean and the amount of phenotypic…

A: Disruptive selection is the selection that selects the individuals with extreme values rather than…

Q: What is the key difference between prezygotic and postzygotic isolating mechanisms? Give an example…

A: Introduction: The reproductive isolation mechanisms are a set of evolutionary mechanisms,…

Q: Which reproductive isolating mechanism(s) might be operating in each situation?  There may be more…

A: Reproductive isolation is a process by which cross breeding is inhibited, as a result the production…

Q: Contrast allopatric speciation with sympatric speciation, and explain how each method may result in…

A: Introduction: In biology, speciation is a process of a new type of plant or animal species is…

Q: Behavioral isolation is considered which type of reproductive barrier? a prezygotic b postzygotic…

A: Reproductive barriers are the mechanisms or processes that prevent the reproduction ,i.e the ability…

Q: Which of the following was NOT a factor shaping the broad scale distribution of populations of a…

A: A species is the fundamental unit of classification and taxonomic position of a life form, as well…

Q: Does this model fit the idea that reproductive isolation can evolve in allopatry as just a byproduct…

A: Allopatry simply means “at other place”. In biogeographic terms, allopatric species are those that…

Q: Which scenarios are examples of reproductive barriers between closely related species that can cause…

A: - Reproductive barriers are nothing but physical,behavioural,morphologically they are restricted to…

Q: Differentiate between how prezygotic and postzygotic isolating mechanisms lead to reproductive…

A: Reproductive isolation is the inability of a species to breed naturally and with related species.The…

Q: How do we know when populations have diverged to the point that they form two different species?

A: According to the biological species concept, organisms are said to be belonging to the same species…

Q: Explain why smaller populations are more vulnerable to the lossof genetic diversity

A: Genetic diversity is the sum of an organism's overall genetic traits at the gene level. It is not…

Q: c) What type of relationship do the two populations have immediately after time Z: Polyphyletic,…

A: Taxonomy is the study of organism categorization, it is the grouping (division) of all known species…

Q: What factors influence gene flow between populations?A. The home range size of the species.B.…

A:

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

A: Answer : Option "C" is correct - The rice species Oryza sativa and O.glaberrima can be crossed to…

Q: What are the barriers that affects the mating of species (in relationship with inbreeding)?

A: Introduction :- A species is the biggest collection of organisms in which any two individuals of the…

Q: Explain the difference in behaviors of temporally isolated species when it comes to Allopatric vs…

A: a species is a group of related organisms which are capable of interbreeding and produce fertilse…

Q: Secondary contact after divergence

A: Answer: An extrinsic barrier separates a species population into two but they come into contact…

Q: Explain why a harmful allele can persist at high frequency ina population.

A: An ALLELE of a gene having impacts on the PHENOTYPE are expected to result in a decrease in FITNESS…

Q: ALLOPATRIC SPECIATION a. Does food affect the mating preferences of the fruitflies? b. What would…

A: Introduction :-  Speciation occurs when a group within a species , separates from other members of…

Q: The largest unit within which gene flow canreadily occur is a(A) population.(B) species.(C)…

A: Passing over of genes from one population to another is called gene flow. The largest unit in gene…

Q: provide evidence that speciation can occur in allopatric populations

A: The speciation is a process by which new species is originated from the old one and increases the…

Q: How might gene flow between populations living in different habitats actually interfere with each…

A: Answer

Q: In the study of 100 plants, the tallness trait, only four short plants were found, knowing that the…

A: The question is related to Hardy Weinberg Equilibrium. p is the dominant allele. q is the recessive…

Q: Can factors that cause sympatric speciation also cause allopatricspeciation? Explain.

A: Sympatric speciation is the evolution of a new species from a surviving ancestral species. Both the…

Q: Directions: Explain and give example for each type of reproductive isolating mechanisms. Pre-zygotic…

A: Prezygotic isolation mechanism do not allow the fertilization of eggs while postzygotic isolation do…

Q: Suppose a species of butterfly split into two species by a vicariance event. Are the male or female…

A: Vicariance event are the ones in which the same species number are segmented due to geographical…

Q: Explain below term is true or not ? "Proportion of total phenotypic variation in a population thatis…

A: The traits or characteristics of an organism that can be observed such as color, shape, size,…

Gene Flow

Gene flow, also known as gene migration, is the introduction of genetic material from a particular population to another population of the same species through interbreeding. For example, a bee facilitates its reproductive process by carrying pollen from one flower to another. The flow alters the composition of the gene pool of the receiving population. It introduces new alleles within the population and helps increase variability. This exchange of genetic material occurs through reproduction and brings about new combinations of traits into the population. Where human beings are concerned, actual migration of populations, whether voluntary or forced, brings about gene flow.  

Population Biology

Population biology is the study of patterns in organism populations, specifically the growth and management of population size, population genetics, the evolution of life history, species interactions, and demography.

Speciation

The process of speciation involves the formation of new species during evolution. The new species evolve in such a way that both new and old species are not able to interbreed. Thus, speciation occurs when few members of one species get separated from the main species due to geographical, mechanical, or reproductive isolation. These separated members develop new traits that make them different from the main species. In other words, speciation could be defined as the absence of gene flow between two populations that become new species. 

Allele Fixation

A gene is a unit of heredity and contains both physical and functional information that shapes an individual. Genes are made up of DNA (deoxyribonucleic acid), which carry genetic information from one generation to another, from one set of parents to their offspring, and so on. Every cell in a human body, or any living organism, has the same DNA, which implies that every cell in an individual’s body has all the information it needs to build and sustain the body!