Card Set Information
Biology Brokaw Holly
Why is it unlikely that genetically engineered strains of bacteria wouldpose a threat to the environment?
Genetically engineered strains of bacteria are poor competitors of wild strains.
Human genetics can be effectively studied using:
population studies of large extended families.
The normal human karyotype contains _______________ chromosomes.
In genomic imprinting:
the expression of a gene depends on which parent it is inherited from.
The Human Genome Project:
All of these.
The human genome contains about _______________ genes.
About what percentage of the human DNA codes for polypeptides?
the presence of multiple sets of chromosomes.
a condition in which an extra chromosome is present or one is absent.
The sperm in the figure below were most likely produced by:
Autosomal monosomy is not seen in live births because:
its effects are so lethal as to cause spontaneous abortion early in pregnancy.
Nearly half of the pregnancies that end in miscarriage have:
major chromosomal abnormalities.
Persons having an XO karyotype are sterile females. They have______________ syndrome.
Down syndrome is an example of a _____________ condition.
Persons having an XXY karyotype are nearly normal males but produce few or no sperm. They have _____________ syndrome.
A karyotype reveals that an individual is XYY. Based on your knowledge of human genetics you correctly conclude that this individual is phenotypically _______ and ________.
Translocation occurs when:
part of a chromosome breaks off and attaches to a nonhomologous chromosome.
In a chromosomal inversion a segment of a chromosome is:
Individuals who are ____________ for sickle cell hemoglobin tend to be____________ resistant to falciparum malaria, but do not experience the effects ofsickled red blood cells.
Gene therapy is:
replacing a mutant allele in certain body cells with a normal allele.
The current status of gene therapy is:
it is being evaluated to assess the risks associated with potential side effects.
Cells become progressively committed to specific patterns of geneactivity and developmental fate through a process known as:
Cells become progressively organized into recognizable structuresthrough a process known as:
The concept of nuclear equivalence states that:
all of the somatic cells in an adult organism have the same genes.
Regulation of development takes place mostly at the level of:
Totipotent nuclei are capable of:
controlling the expression of other genes in the nucleus.
Cloning mammals has proven to be:
a process with a low success rate and a high incidence of genetic defects.
Cells able to divide and form some types of cells in an organism are called:
pleuripotent stem cells.
Totipotent human stem cells can apparently be obtained only from:
Embryonic stem cells cannot develop into ______ cells.
The only known source of embryonic stem cells is:
early human embryos.
Evolution is genetic change in ____________ that occurs over time.
Passing on traits or characteristics that were acquired during the
lifetime of an organism to its offspring is a concept that is attributed to:
Jean Baptiste de Lamarck.
On the Galapagos Islands, Charles Darwin questioned why:
the island species resembled those from South America.
Who proposed that the Earth’s geological features formed slowly over time, creating long periods for evolution?
_________________ penned an essay stating that populations have thecapability to outgrow their food supply resulting in disease, famine, and competition.
Evolutionary modifications that improve the survival and reproductive
success of an organism are called:
Differential reproductive success is equivalent to:
Darwin might have made greater advances in his theory if he had:
understood the work of Gregor Mendel.
During the 1920s to 1940s, biologists combined Mendelian genetics with Darwin’s theory to form a unified explanation of evolution that is referred to as:
the modern synthesis.
What process ultimately provides the genetic variability that naturalselection acts on during evolution?
Perhaps the most direct evidence for evolution comes from:
the fossil record.
Which of the following would be least likely to form a fossil?
an organism in the tropical rain forest
Fossilized remains of humans and their immediate ancestors are found:
only in relatively young rock.
Paleontologists have pieced together from fossils the evolution of the whale from: four-legged, land dwelling mammals.
Bird wings and insect wings are considered to be:
The front limbs of birds and bats, both wings, are considered to be:
When populations with separate ancestors adapt in similar ways tosimilar environmental constraints, it is referred to as:
If two species have homologous structures:
the species are related by a common ancestry.
The indigenous plants and animals of the Galapagos Islands and CapeVerde Islands:
resemble the nearest mainland species, but have evolved into new species.
Australia has distinctive organisms, such as egg-laying mammals andpouched mammals (marsupials), because they have:
been separated and isolated from other land masses for a long period of time.
All of the individuals of the same species that inhabit the same place atthe same time are known as:
The study of the genetic variability within a population and the forcesthat change allele frequencies is:
All of the alleles for all the loci present in a population is called the:
If a population of 1000 individuals has 160 aa genotypes, assuming simple dominance by the A allele, the phenotype frequency of the dominant phenotypeis:
If a population of 1000 individuals has 250 aa genotypes, assuming only 2 types of alleles (A&a), the expected a allele frequency is:
A population in which the allele and genotype frequencies do not change over time is said to be in:
What is the correct equation for the Hardy-Weinberg principle?
p2 + 2pq + q2 = 1
In the Hardy-Weinberg equation, the term q2 refers to the frequency of:
the homozygous recessive genotype at a given locus.
The Hardy-Weinberg principle of genetic equilibrium tells us what toexpect when a sexually reproducing population is:
at genetic equilibrium.
Which of the following causes changes in allele frequencies?
All of these.
__________________________ is thought to be due to increased homozygosity.
Positive assortative mating in a population will:
The ultimate source of all new alleles is:
Random evolutionary changes in a small breeding population is knownas:
The process that decreases the number of organisms with phenotypesless fit to meet environmental challenges is:
In ____________ selection, individuals with a phenotype near the meanare favored over those at the phenotypic extremes.
When phenotypes are favored at one extreme of a normal distribution,____________ selection occurs.
The presence of two or more different alleles in a population for a givenlocus is termed:
Frequency-dependent selection acts to decrease the frequency of whichphenotype in a population?
the most common phenotype
Mutations that may confer no apparent selective advantage in aparticular environment are referred to as: