bio quizzes
la jornada
work day
The Hardy
Weinberg equation is used to - predict genotype frequencies in a population.
Which condition would disturb the Hardy
Weinberg equilibrium and cause the gene pool to change? - Several homozygous recessive individuals leave the population.
If a population is in Hardy
Weinberg equilibrium and remains in equilibrium, which of the following will be true? - Individuals survive and reproduce equally well regardless of their genotype.
What variable remains constant, or in equilibrium, in the Hardy
Weinberg model? - genetic variation
According to the ______ model, evolution occurs in spurts; species evolve relatively rapidly and then remain unchanged for long periods.
punctuated equilibrium
el punto de vista
point of view
All the rabbits living in a particular area would be an example of a(n)
population
If an intestinal cell in a grasshopper contains 24 chromosomes, then a grasshopper sperm cell contains ______ chromosomes.
12
A fruit fly somatic cell contains 8 chromosomes. This means that ______ different combinations of chromosomes are possible in its gametes.
16
In a cell containing 10 chromosomes, meiosis results in the formation of daughter cells containing ______ chromosomes.
5
Which of the following are NOT aspects or results of sexual selection?
Hardy-Weinberg equilibrium
Which of the following statements applies to real populations?
Hardy-Weinberg equilibrium is rare.
Which scientist proposed that if an organism used a structure so much that it grew, the trait for that larger structure could be passed to its offspring?
Jean Baptiste Lamarck
In an individual of genotype Aa, where are the A and a alleles physically located?
One allele is on one chromosome, and the other is in the same position (locus) on the homologous chromosome.
Which of the following is a key difference between meiosis and mitosis?
Pairing of homologous chromosomes.
Which is a postzygotic reproductive barrier?
The hybrid offspring of two species of jimsom weeds always die before reproducing.
hacer su sueño realidad
To make one's dream a reality
ganarse dinero por su cuenta
To make your own money
Which of the following indicates Turner syndrome?
XO
Which of the following represents a chromosomally normal human female?
XX
If a version of a gene is dominant, then
a single copy of it will produce its trait.
The evolution of numerous ecologically diverse species from a single ancestor in a relatively short time period, as seen in Darwin's finches, is called
adaptive radiation
Previously, it was thought that the blending hypothesis explained inheritance. The blending hypothesis explained that
after a mating, genes of the two parents are mixed in the offspring and lose their individual identities.
una oferta
an offer
Two animals are considered members of the different biological species if they
are male and female, but cannot interbreed.
The development by scientists to create a new color in a rose is the result of
artificial selection
A difference of chemical scents between two populations is an example of what kind of isolation?
behavioral
los beneficios
benefits
When a horse and a donkey mate, they produce infertile hybrids called mules. According to the ______ species concept, horses and donkeys are ______.
biological; different species
When applied to Mendel's experiments, the term true
breeding means a self-fertilization of two plants that produces - offspring identical to the parent.
la carrera
career
un/una cajero/a
cashier
Microevolution is
changes in the gene pool of a population from one generation to the next.
el campo
countryside
perjudicial
damaging, harmful
Many years of evolution is most likely to produce
differences between species and their ancestors.
Biogeography is the study of the
distribution of organisms around the world.
What is speciation?
divergence of two or more species from an existing one
If an organism has a vestigial structure, that structure likely once had a function in a(n)
early ancestor
el/la ingeniero/a
engineer
un establecimiento
establishment
What is suggested by the similarity of early embryos of different species of vertebrates?
evolution from a distant common ancestor
Allopatric speciation is most likely to occur in which of the following scenarios?
fish living in two different spring pools separated by a large expanse of desert
What is the typical result when a diploid cell undergoes meiosis?
four haploid cells
DdEe pea plants can produce ______ type(s) of gametes, but a ddee plant can produce ______ type(s) of gametes.
four; one
Crossing over occurs during
prophase I
Over time, adaptations can lead populations to experience
genetic changes.
Mutations are important because they bring about
genetic variation needed for a population to evolve.
What is the first step in allopatric speciation?
geographic isolation
la contratación
hiring, contracting
During anaphase I,
homologous chromosomes separate and migrate toward opposite poles.
A new species can arise in a single generation
if a change in chromosome number creates a reproductive barrier.
When you cross two heterozygous (Aa), the offspring will most likely be
in the ratio 1:1 homozygous to heterozygous
When we say that an organism is haploid, we mean that
its cells each have one set of chromosomes.
un puesto en el mercado laboral
job/position in the labor market/workforce
Several inherited disorders are much more common in close
knit religious communities, such as the Amish, than in the general population. This is at least partly because - people in such communities are more likely to reproduce with relatives.
los conocimientos y las habilidades
knowledge and skills
laborioso/a
laborious, hard-working
el/la abogado/a
lawyer
What is the term for a change in the relative frequencies of alleles in a population over several generations?
microevolution
The ______ species concept is the most applicable to classifying species from the fossil record.
morphological
Down syndrome can be the result of
nondisjunction of chromosome 21 during meiosis.
For which of the following groups would the biological definition of species be useful?
oaks and other sexually reproducing, extant (currently living) trees
mayor
older
por su cuenta
on his/her own
four principles of natural selection
overproduction, variation, adaptation, descent with modification
un trabajo de medio tiempo
part-time job
una función
performance
Protein sequences in one organism that resemble those of another suggest a
shared ancestry
What evidence for a past evolutionary relationship can be seen in different groups of vertebrates?
similar features in early stages of embryos
In meiosis II,
sister chromatids are separated.
una destreza
skill, ability
An example of a cell that is 2n is a
somatic cell
apto/a
suitable
los meses veraniegos
summer months
Which of the following is an example of a vestigial structure?
the wings of an ostrich
A proposed explanation for a wide range of observations and experimental results that is supported by a wide range of evidence is what we call a
theory
adjuntar
to attach
convertirse
to convert
culminar
to end, to culminate
apetecer
to feel like
seguir un horario
to follow a schedule
involucrarse
to get involved
atender
to help, to assist
solucionar problemas
to solve problems
At the end of telophase I of meiosis, as cytokinesis occurs, there are
two haploid cells
The difference in the physical traits of an individual from those of other individuals in a group is called a(n)
variation.
The remnant of an organ that had a function in an early ancestor is known as a(n)
vestigial structure.
