Allelic Frequency

Question 0

What is relative allele frequency

Answer 0

The number of times that the allele occurs in a gene pool compared to the number of times other alleles for the same gene occur

Question 1

What is a gene pool

Answer 1

All of the genes that are present in a population

Question 2

How do new allele arise?

Answer 2

Through random mutations

Question 3

In genetic terms what is the definition of evolution

Answer 3

Any change in the allele frequency in a population

If the frequency of the allele changes, then the population is evolving

Question 4

What is genetic equilibrium

Answer 4

If the number of the alleles does not change from one generation to the next, then the relative allelic frequency has not changed and evolution is not occurring even if the phenotypic frequency is changing

Question 5

What is happening if the number of the alleles is changing

Answer 5

Evolution is occurring

Allelic frequencies cannot change if there is not genetic variation within a species

Question 6

What are sources of genetic variation

Answer 6

Mutations - any change in a sequence of DNA and occur because of mistakes in replication, radiation, chemicals, and viruses
Gene shuffling - the random rearrangement and recombination if chromosomes
Thus sexual reproduction is a major source

Question 7

When does gene shuffling occur

Answer 7

During meiosis due to independent assortment
Crossing over in meiosis
Randomness of fertilization

Question 8

How is inheritable variation expressed

Answer 8

By single gene traits or by polygenic traits