18: population and evolution

Question 1

what is a population

Answer 1

group of organisms of the same species that occupies a particular space at a particular time that can potentially interbreed

Question 2

what is a gene pool

Answer 2

all alleles of the genes of all individuals in a population at a given time

Question 3

what is the allelic frequency

Answer 3

number of times an allele occurs within a gene pool

Question 4

if there are 10,000 people in a population how many alleles will there be in a gene pool for particular gene ( cystic fibrosis)

Answer 4

20,000

Question 5

if in a population of 10,000 everyone had the genotype of FF what is the frewuency of F allele

Answer 5

frequency of F allele 100%
probability of everyone is 100%, being ff is 0%

Question 6

In one species of squirrel, Sciurus carolinensis, fur colour is controlled by one
gene, with two codominant alleles. CG represents the allele for grey fur colour,
and CB
represents the allele for black fur colour.
The table below shows the three possible phenotypes.
Genotype Phenotype
CGCG Grey fur
CGCB Brown-black fur
CBCB Black fur
(a) In a population of 34 S. carolinensis, 2 had black fur.
Use the Hardy–Weinberg equation to estimate how many squirrels in this
population had brown-black fur