2.2b - Fitness

Question 1

Fitness is…

Answer 1

an individual’s ability to be successful at surviving and reproducing

Question 2

Fitness is a measure of…

Answer 2

of the tendency of some organisms to produce more surviving offspring than competing members of the same species

Question 3

Fitness refers to the contribution made to…

Answer 3

the gene pool of the next generation by individual genotypes

Question 4

Absolute fitness is…

Answer 4

the ratio between the number of individuals of a particular genotype after selection, to those before selection

Question 5

Absolute fitness equation

Answer 5

frequency of a particular genotype after selection/ frequency of a particular genotype before selection

Question 6

If the absolute fitness is 1…

Answer 6

then the frequency of that genotype is stable

Question 7

If the absolute fitness is a value greater than 1…

Answer 7

then the frequency of that genotype is increased

Question 8

If the absolute fitness is a value less than 1…

Answer 8

then the frequency of that genotype is decreased

Question 9

Relative fitness is…

Answer 9

the ratio of the number of surviving offspring per individual of a particular genotype compared with the number of surviving offspring per individual of the most successful genotype

Question 10

Relative fitness equation

Answer 10

number of surviving offspring per individual of a particular genotype/ number of surviving offspring per individual of the most successful genotype