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