selective breeding in plants

Question 1

why are plants selectively bred?

Answer 1

disease resistance in food crops
increased crop yield
hardiness to weather conditions (e.g. drought resistant)
better tasting fruits
large/unusual flowers

Question 2

what plant has been selectively bred?

Answer 2

wild brassica- given rise to cauliflower, cabbage, broccoli

Question 3

what are the problems with selective breeding?

Answer 3

can lead to “inbreeding”

Question 4

when does inbreeding occur?

Answer 4

when the best animals/ plants (which are closely related to eachother) get bred together

Question 5

what does inbreeding lead to?

Answer 5

a reduction in the gene pool- reduction of alleles in a population

Question 6

what does inbreeding increase the chance of?

Answer 6

organisms inheriting dangerous genetic defects organisms being vulnerable to new diseases- less chance of resistant alleles being present in the reduced gene pool

Question 7

what are the steps for selective breeding?

Answer 7

1) choose individuals with the desired feature
2) let only these individuals reproduce
3) choose the offspring that have the desired feature
4) let only these individuals reproduce
5) repeat steps 3 and 4 until you have produced a variety in which all the individuals show the desired feature