Genetics Questions

What did the Grants learn about mate choice from the Galapagos finches?a) Phenotype plays no role in mate choiceb) Finches prefer mates with beaks similar in size to their ownc) Finches prefer mates with smaller beaks than their ownd) Finches prefer mates with larger beaks than their own

In a particular environment, populations that are very different from each other are less likely to ____with each other for resources.

When researches use a molecular clock they can estimate the time since two organism shared a _____

A ____is all of the genes that are present in a particular population.

When a population is not evolving, it is in a situation called___

Species Y and Z have very different genes. Species A and B have only a few different genes. What is most likely true about these species? Species Ya) is older than Species Zb) is younger than Species Zc) evolved for a long time separately from Species Zd) shares a relatively recent common ancestor with Species Z

A polygenic trait can havea) many possible genotypes, but few possible phenotypesb) many possible genotypes producing many possible phenotypesc) fewer phenotypes than most single gene traitsd) fewer genotypes than most single gene traits

In the Galapagos finches that the Grants studied, a pattern of natural selection called_____ favored individuals with larger, heavier beaks during a drought.

In genetic drift, the allele frequencies in a gene pool change because of a) mutationsb) chancec) natural selectiond) genetic equilibrium

The separation of populations by barriers such as rivers, mountains or bodies of water is calleda) temporal isolationb) geographic isolationc) behavioral isolationd) genetic equilibrium

A single-gene trait that has two alleles and that shows a simple dominant-recessive pattern will result ina) one phenotypeb) two phenotypesc) four phenotypesd) millions of phenotypes

A ___uses mutation rates in DNA to estimate the time that two species have been evolving independently.

The Galapagos finch species are an excellent example of a) speciationb) genetic equilibriumc) stabilizing selectiond) selection on single-gene traits

In a fox population, the allele frequency of a gene for red fur changes from 20 percent to 30 percent. What can you say about the population of foxes?a) the population is expandingb) the population is evolvingc) the population is decreasingd) the population is not evolving

Although they often live in the same habitat, the American toad breeds earlier in the spring than the Fowler's toad does. What can be inferred from this information?a) the two species do not interbreed because of geographic isolationb) the two species do not interbreed because of temporal isolationc) the two species interbreed throughout the spring seasond) The american toad will cause the extinction of the Fowlers toad

If two populations have been reproductively isolated and can no longer breed and produce fertile offspring, the process of _________________________ has occurred.

The genes carried by all members of a particular population make up the population's a) allele frequencyb) phenotypec) genotyped) gene pool

Which of the following can produce a duplicate gene?a) chromosome replication during mitosisb) crossing over during meiosisc) neutral mutation during transcriptiond) genetic drift during reproduction

Genetic recombination includes the independent movement of chromosomes during meiosis as well as a) mutations from radiationb) changes in the allele frequencyc) crossing overd) mutations from chemicals

The allele frequencies of a population are more likely to change ifa) the population size is increasedb) no immigration or emigration occursc) mating is not randomd) the mutation rate decreases