Genetics Questions

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

What do Hox genes control?a) gene duplicationb) mutationsc) patterns of embryological developmentd) molecular clocks

The passing of genes from one organism to another organism that is not its offspring is called___

What situation might develop in a population having some plants whose flowers open at midday and other plants whose flowers open late in the day?a) behavioral isolationb) geographic isolationc) temporal isolationd) genetic drift

The type of genetic drift that follows the colonization of a new habitat by a small group of individuals is calleda) the Hardy-Weinberg principleb) the founder effectc) directional selectiond) stabilizing selection

If a mutation introduces a new skin color in a lizard population, which factor might determine whether the frequency of the new allele will increase?a) how many other alleles are presentb) whether the mutation makes some lizards more fit for their environment than other lizardsc) how many phenotypes the population hasd) whether the mutation was caused by nature or human intervention

In organisms that reproduce sexually, most variation that can be inherited is due toa) mutations during gamete formationb) polygenic traitsc) gene recombination during sexual reproductiond) the effects of radiation

Natural selection acts directly ona) allelesb) genesc) phenotypesd) mutations

The number of phenotypes produced for a given trait depends upona) the number of genes that control the traitb) which form of the trait is dominantc) the allele frequencies of the various allelesd) the relationship of allele frequencies to Mendelian ratios

Phenotypic ratio is 3 tall: 1 short. What is probability of having one tall and 2 short plants

Which enzyme is involved in adding RNA nucleotides to the building strand of RNA

n malarial regions of Nigeria, two morphs of red blood cells are encoded by two alleles, A = normal and S = sickle cells, with relative fitnesses of the three genotypes in the population given below. This is an example ofA.) Stabilizing selectionB.) Directional selectionC.) Disruptive selectionD.) Frequency-dependent balancing selectionE.) Heterozygote advantage balancing selection

The evolution by natural selection of HIV resistance to AZT is an example ofA.) Stabilizing selectionB.) Directional selectionC.) Disruptive selectionD.) Frequency-dependent balancing selectionE.) Heterozygote advantage balancing selection

Which of the following statements is/are accurate?A.) Individuals evolve through natural selection.B.) Organisms evolve structures that they need.C.) Natural selection works on variation already present in a population.D.) Both A and C.E.) Both B and C.

Humans babies with low birth weights have increased mortality from neonatal infection and other causes; high birth weight babies often die of complications to during childbirth. This is an example ofA.) Stabilizing selectionB.) Directional selectionC.) Disruptive selectionD.) Frequency-dependent balancing selectionE.) Heterozygote advantage balancing selection

What is required for biological evolution to occur?A.) natural selectionB.) variation in acquired traits among individuals in the populationC.) large populationD.) genetic variation in the populationE.) many generations

Which statement describes the canary with the greatest biological fitness?A.) canary that lives to be 3 years old and has four offspring, two of which survive to reproduce themselvesB.) canary that lives to be 5 years old and has five offspring, one of which survives to reproduceC.) canary that lives to be 2 years old and has four offspring, all of which survive to reproduce themselvesD.) canary that lives to be 7 years old and has three offspring, all of which survive to reproduceE.) All are equally fitCannot be determined from the information given

Which of the following statements is/are accurate? (Select all that apply.)A.) Natural selection works on variation already present in a population.B.) Evolution by natural selection results from selection on both heritable and non-heritable traits.C.) Individuals evolve through natural selection.D.) Organisms evolve structures that they need.E.) None of the statements are true.

What conditions lead to evolution by natural selection? (Select all that apply.)A.) unlimited resourcesB.) competition for limiting resourcesC.) heritable variation in the populationD.) large population

How does natural selection explain how bacterial populations evolve resistance to antibiotics? Select the single best answer. A.) antibiotics cause resistance mutations in bacteria, that are then passed on to their progenyB.) individual bacteria adapt to antibioticsC.) individual bacteria adapt to antibiotics and pass on their adaptations to their progenyD.) rare, resistant mutant bacteria in the population survive antibiotic treatment