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Flashcards in Chapter 16 Deck (68)
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1

group of individuals that look similar and whose members are capable of producing fertile offspring

species

2

the definition of species comes from what 2 different "concepts"

morphological
biological

3

what is morphological species concept based on

internal and external similarities and differences

4

what is the physical appearance of an organism

morphology

5

what is biological species concept based on

an organism's ability to reproduce and produce fertile offspring

6

all members of the same species that live in a particular area at the same time

population

7

the offspring of two morphologically dissimilar organisms

hybrid

8

two things that look different

morphologically

9

within a population, individuals vary in many observable traits and they can be represented on a __ __

bell curve

10

within a population, individuals vary in many observable traits and they can be represented on a __ __

bell curve

11

what causes variations within species

environmental factors and heredity

12

what are the environmental factors that cause variation within species (2)

amount and quality of food

13

3 impacts of heredity that cause variation within species

mutations, genetic recombination, crossing over

14

a population is a collection of ___

genes

15

collection of genes for all the traits of a population

gene pool

16

percentage of a specific allele of a certain gene in a gene pool

allele frequency

17

population in which allele frequency does not change

genetic equilibrium

18

Weinburg was a German ___ and Hardy was a British ___

physician, mathematician

19

Weinburg was a German ___ and Hardy was a British ___

physician, mathematician

20

5 requirements for genetic equilibrium

no mutations occur
individuals neither enter nor leave through migration
population is large
random mating
no natural selection

21

what role can mutation play in the evolution of a species(3)

change of genes or chromosomes
produce new alleles for a trait
change frequency of alleles

22

immigration

movement into a population

23

emigration

movement out of a population

24

gene flow

movement of genes into or out of a population through migration

25

genetic drift

allele frequency in a population changes as result of a random event

26

genetic drift

allele frequency in a population changes as result of a random event

27

genetic drift is significant only in ___ or ___ sized populations

small or medium

28

with genetic drift an allele may ___ completely in a small population

disappear

29

with genetic drift an allele may ___ completely in a small population

disappear

30

genetic drift is more stable in a __ population

larger