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anthropology ch4

Stack #155936

QuestionAnswer
Mendel's principle of segregation states that members of a pair of hereditary factors controlling a trait separate into different sex cells true
Genes controlling different traits are inherited independently of one another true
Dominant alleles are always more common and better adapted to the environment than recessive alleles false
Hemophilia is an example of an autosomal dominant trait false
Polygenic traits are influenced by genes at multiple loci and often by environmental factors true
Outside of the nucleus, the only cellular organelles that contain their own DNA are the ribosomes false
A change in the frequency of alleles from one generation to the next is the current modern definition of evolution true
Genetic drift is the exchange of alleles between populations false
one of the best-documented cases of natural selection in humans is the relationship between achondroplasia and the ABO blood group system false
Populations evolve, individuals do not true
In a cross between two purebred strains of garden peas Mendel found that in the offspring one of the traits disappeared
Mendel used the term dominant for a trait that prevented another trait from appearing
When Mendel crossed peas with Rr and Rr genotypes, the phenotypic ratio of the offspring was ________ 3:1
Genes exist in pairs in individualsl during the production of gametes, the pairs are separated so that a gamete has only one of each kind. This is known as the principle of segregation
What physiological process explains Mendel's principle of segregation? meiosis
Which of the following is characteristic of dominant alleles? dominant alleles are expressed in heterozygous genotypes
A trait which is inherited as a recessive is expressed in the homozygous recessive individual
An alternative form of a gene is called a(n) allele
Which of the following genotypes is homozygous OO
The principle of independent assortment states that the distribution of one pair of genes does not influence the distribution of other pairs
A heterozygous genotype would be written as Aa
Mendelian traits are influenced by alleles at only one genetic locus
When there are two different alleles present in a heterozygote and both of these alleles are expressed, this condition is called codominance
Geneticists call the diagram that shows the mating that have taken place in a family, going back several generations, a pedigree chart
Which of the following are modes of Mendelian inheritance? all of the above - autosomal recessive, autosomal dominant, and sex-linked
Polygenic traits are produced by the interaction between multiple genes and the environment
This ring-shaped DNA molecule is found outside of the nucleus and is transmitted exclusively through the maternal line mitochondrial DNA (mtDNA)
Polygenic traits can often be graphically illustrated as a normal curve
In many polygenic traits the various loci each influence the phenotype producing an additive effect
The modern synthesis integrates Darwinian natural selection with genetics
The modern genetic definition of biological evolution is a change in allele frequency from one generation to the next
Which of the following is the ONLY evolutionary force that can create brand-new genetic variation within a population? mutation
The introduction of alleles from one population into another population is known as gene flow
An example of gene flow would be The children of U.S. servicemen and Vietnamese women in Vietnam
The force of evolution which is significant when small human populations become isolated is genetic drift
In 10th Century Norway, Eric the Red and his followers were banished for murders and general rowdiness. This small group, which had a higher representation of an allele that contributes to red-hair color and colonized, this would be an example of founder effect
In any sexually reproducing species both parents contribute genes to the offspring. This is recombination
The hemoglobin S allele reaches its highest frequency in areas where malaria is present
The unit of evolutionary change is the population
Created by: vojtek
 

 



Voices

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