natural selection and selective breeding

Question 1

mutations

Answer 1

• rare
• most are harmful some useful
• sudden spontaneous change in genetic makeup of organism
• during meiosis in gamete formation; affects all of cells - inherited mutation
• occurs in body cell- affects only cells produced by mitosis from affected cell; give rise to cancers in cells- not inherited

Question 2

natural selection

Answer 2

MVARPS
vest adapted will survive and reproduce in greater numbers
variations

Question 3

antibiotic resistance

Answer 3

chemicals that kill bacteria and do not harm animal cells- target cell structures (cell walls)
penicillin;
-doctors used penicillin, killed bacteria
-mutation gave some resistance
-better adapted to environment
-survived in greater numbers to reproduce and pass on resistance allele
-repeated with each generation

Question 4

selective breeding

Answer 4

a means of producing animals and plants with desirable characteristics by choosing individuals to breed from and by repeating the process for many generations

Question 5

methods of selective breeding

Answer 5

selecting desired organisms from pop and breeding together
look among offspring for best combination of desired features/phenotypes
only use these individuals for breeding next gen
repeat gen after gen