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Generally, female choice.
Take an extreme example of sexual dimorphism, elephant seals. The males can be twice the size of the females and hold many females in harems. This is the reproductive strategy that works for these organisms. The females, at some time in the past, started choosing larger males to breed with and their progeny inherited this choice. This lead to more survivability and reproductive success in the elephant seal and the size of males is only constrained by physics. So, this is nonrandom, directed, mating and, basically female choice, whether it had an arbitrary beginning or not is anybodies guess.
What else can I help you with?
What are the 5 ways a population can evolve?
A population will most likely evolve when there is a small population, mutations exists, natural selection may take place, nonrandom mating occurs, and/or gene flow may occur. Sexual selection, genetic drift, Gene flow, Mutation, and natural selection are five ways a population can evolve. Sexual selection is natural selection arising through preference by one sex for certain characteristics in individuals of the other sex. Genetic drift is variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce. Gene flow is the transfer of alleles or genes from one population to another. Mutation is the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. Natural selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.
Difference between clearence fit transiton fit and interference fit?
clearance Fit - if the clearance is more between the mating parts then it is known as clearance fit. Transition Fit- If the clearance is less between the mating parts then it is known as Transition fit Interference Fit- If the mating parts are fouling or interfering.then it is known as Interference Fit
What keeps different species of Finches from mating?
Song and appearance both play a role in keeping different species from mating.
A factor that is necessary for the formation of a new species?
different mating patterns
What are the 5 conditions required for non evolving populations?
1) every large population 2) no emigration or immgration (no gene flow) 3) no mutations: no new alleles added to the gene pool 4) random mating: no sexual selection 5) no natural selection: all genotypes have equal chance at surviving
What does nonrandom mating mean and give examples?
Me and You
What effects can nonrandom mating exert on a population?
none
Breeding within only a narrow band of the population demonstrates what?
nonrandom mating
Breeding within only a narrow band of population demonstrayts?
Nonrandom mating
What Breeding within only a narrow band pf the population demonstrates what?
A) Nonrandom mating
How can nonrandom mating change allel frequencies?
Non-random mating means that individuals of many species have a choice about which partners to mate with. In population genetics, allele frequencies are used to depict the amount of genetic diversity in a species. There is no current research to show nonrandom mating impacts a species genetic diversity.
What is the difference between nonrandom mating and reproductive isolation?
Nonrandom mating refers to individuals in a population having an equal opportunity to mate with other organisms in the population. Most organisms choose their mates based on physical and behavioral characteristics. Reproductive isolation refers to physical barriers segregating population and therefore causing change in genetic variation.
Which does breeding within only a narrow band of the population demonstrates?
Nonrandom mating:) THC<3
What factor would most likely disrupt genetic equilibrium in a large population?
Nonrandom mating.
What are the influences of evolution?
genetic drift, gene flow, mutation, natural selection and nonrandom mating ( sexual selection ).
What is one potential negative consequence of nonrandom mating based on geographic proximity?
One potential negative consequence of nonrandom mating based on geographic proximity is an increase in the prevalence of genetic disorders in the population due to higher chances of mating between individuals with common genetic traits. This can result in a higher frequency of inherited diseases and genetic abnormalities in offspring.
Is nonrandom mating a change in the gene pool results in adaptation to the environment?
no because the same species mate with the same spices!!
