Chapter 13.1 Flashcards
All humans belong to the same _____ but not the same ______.
genus
species
Linnaeus coined the binomial name ___ _____ to describe the human species.
Homo sapiens
Modern human species is known as ___ ____ ____.
Homo sapiens sapiens
A species is defined as a group of individuals that can interbreed and produce fertile offspring but cannot reproduce with members of other species. This is an example of the _____ _______ ______.
Biological species concept
Different forms of a gene that exist are known as ______ of the gene.
alleles
A lion and leopard are the same ____ different _____.
genus
species
Scientists refer to the sum total of alleles found in all the individuals of a species as the species _____ _____.
gene pool
The spread of an allele throughout a species’ gene pool is called _____ _______.
gene flow
gene flow can take two forms
1.
2.
pre-fertilization
post-fertilization
Pre-fertilization prevent fertilization from occurring.
True
Post-fertilization barriers Fertilization occurs but hybrids cannot reproduce.
True
An example of interspecies hybrid is the cross between a horse and a donkey resulting in a
mule
Hybrid ______ often occurs because hybrid individuals cannot produce viable sperm or egg cells.
sterility
The evolution of one or more species from an ancestral form is called
speciation
all humans belong to the same biological species
true
The establishment of a new population far from an original population may lead to the evolution of several new species is a process known as
adaptive radiation
Populations that are isolated from each other by distance or a barrier are known as
allopatric
Separation between the gene pools of two populations may occur even if the populations are living near each other meaning that they are
sympatric
The mating period between apple maggot flys and hawthorn flies differ resulting in little _____ _____ between them.
gene flow
Darwin assumed that speciation occurred over millions of years was tiny changes gradually accumulated is known as
gradualism
Biologists do not agree on a standard definition of ______ _____.
biological race
Describes races as populations of a single species that have diverged form each others as a result of isolation of their gene pools
biological race
