evolution

Question 1

explain mutation

Answer 1

• RANDOM
• new alleles
• passed on by mitosis, meiosis or cell division

Question 2

explain genetic drift

Answer 2

• RANDOM
• chance variation sin the level of different alleles over time
• REDUCES genetic diversity -> loss of alleles
• small populations affected

Question 3

explain gene flow

Answer 3

• breeding two populations leads to more similarities
• migration
• random or non-random

Question 4

explain natural selection

Answer 4

• NON-RANDOM
• increase in alleles that are beneficial

Question 5

wha is required for natural selection

Answer 5

• variation in phenotypes
• different levels of fitness
• inheritable traits