Crop Evolution

Question 1

What is the process of crop evolution?

Answer 1

A combination of natural and conscious human selection to change weedy plant species
into domesticated crops.

Question 2

How does natural selection differ from human selection?

Answer 2

Natural is survival of the fittest, Human is survival of the ones chosen by the
grower/breeder.

Question 3

What characteristic have been altered by natural selection

Answer 3

more shininess, more seed shatter, more toxins, more dormancy, smaller
seeds.

Question 4

What characteristic have been altered by human selection

Answer 4

less shininess, less seed shatter, less toxins, less dormancy, fewer larger
seeds and fruits.

Question 5

What characteristic have been altered by both natural and human selection

Answer 5

higher yield, more disease resistance, better drought and stress tolerant.

Question 6

What is the difference between a diploid and a polyploidy?

Answer 6

Diploids have only one set of chromosomes, where as polyploids have multiple pairs of chromosomes

Question 7

What is the difference between an allopolyploid and an autopolyploid?

Answer 7

different diploid ancestors together (allopolyploids) of multiple pairs of chromosomes
(autopolyploid).

Question 8

name 2 diploid crops

Answer 8

corn and barley

Question 9

name 2 allopolyploids

Answer 9

wheat and canola

Question 10

name 2 autopolyploid

Answer 10

potato and alfalfa

Question 11

What impact has agriculture had on the world, ancient and recent?

Answer 11

o Soil, Air, Water – pollution.
o Remove unwanted plants and animals from a farm area.
o Plants and animals evolved into a symbiotic relationship.
o Social organization.
o Population growth.