Evolution - Allele Frequencies

Question 1

what Darwin didn’t know

Answer 1

• lack of knowledge left two big gaps in Darwin’s thinking
• he had no idea how heritable traits pass from one generation to the next
• he didn’t know how variation in heritable traits appears

Question 2

gene pool

Answer 2

• consist of all genes, including all the different alleles, that are present in a population
  occurrence of alleles

Question 3

relative frequency

Answer 3

• the number of times that the alleles occurs in a gene pool, compared with the number of times other alleles for the same gene occur
• expressed in percentage

Question 4

changes in population

Answer 4

• evolution is any change in the relative frequency of alleles in a population

Question 5

two main sources of genetic variation

Answer 5

• mutations
• genetic shuffling that results form sexual reproduction
• crossing over