Anth 1
Modern __________ populations are genetically more variable than other populations.
african
Variation within groups refers to differences
among individuals in the same group and is usually genetic
phenotypic traits result from
an interaction of genes and environment
genetic drift
between groups
natural selection (within or between)
between groups
evolutionary theory predicts that human females will prefer males who
can provide the most resources
the selection of any genotype is always
depends on the environment
phenotypic traits such as height are
determined by an interaction between genes and the environment
genetic variation refers to
differences among individuals in the genes they inherit
variation refers to
differences between individuals and populations of individuals
all observed adaptive difference between individuals are the result of genetic differences (t/f)
false
classifications fo people in Brazil is based on skin color only (t/f)
false
humans are the only species to exhibit homosexual behaviors (t/f)
false
it is easy to determine the relative importance of genetic and environmental influences for particular phenotypic traits (t/f)
false
most human genetic variation exists between (not within races) (t/f)
false
natural selection cannot affect behavior (t/f)
false
the small amount of genetic variation in living humans indicates that we are descended from a large population of about 1 million (t/f)
false
variation in mtDNA shows that humans are more genetically variable than other species, such as chimpanzees (t/f)
false
Scientists conventionally divide human variation into which two components?
genetic and environmental
classifying humans into races is not possible because
genetic variation is continuous
evolutionary theory predicts that male humans will prefer females who
have high reproductive value
genetic results for "black" and "white" Brazilians reveals
little correlation between phenotype and ancestry
generally, Buss' cross-cultural study shows that
males and females differ in their mate preferences in ways predicted by evolutionary theory
Variation at a single cell locus can be maintained by
mutation & heterozygous advantage
a selection-mutation balance occurs when
mutation introduces alleles that selection does not favor
males and females care most about
mutual attraction and love
body size varies among human groups. this variation may be caused in part by
natural selection
adaptive lag
non-insulin dependent diabetes (NIDD)
most modern scientists studying human variation believe that humans can be divided into
one race: the human race
the low levels of genetic variation in contemporary human populations is likely due to the fact that contemporary humans arose from
small populations recently in the past
all modern humans are descended from an African population (t/f)
true
different traits tend to classify people into different groups (t/f)
true
genetic drift creates genetic variation Among isolated groups (t/f)
true
geographical distance is a very good predictor of genetic distance between human populations (t/f)
true
males are more concerned about their mates' sexual rather than emotional infidelity, than females (t/f)
true
parents and offspring can share traits because of shares genes, shared environment, and shared culture (t/f)
true
the ability to digest lactose as an adult has evolved since people began domesticating livestock (t/f)
true
Sickle-Cell anemia causes
unusually shaped red blood cells
adaptive lag (within or between)
within groups
balanced polymorphism
within groups
selection-mutation balance
within groups
most genetic variation exists
within groups of humans