Selective Breeding

Question 1

What is Selective Breeding

Answer 1

This is the artificial breeding of selected animals with desired traits.

Question 2

What is the difference between selective breeding and natural selection

Answer 2

Selective Breeding is artificial, while natural selection is not.

Question 3

What are the steps in selective breeding

Answer 3

1. Selecting animals with desired traits.
2. Breeding these animals together.
3. Selecting offspring with the desired traits.
4. Breeding them and continuing for many generations until the desired traits are there.

Question 4

What are the advantages of selective breeding

Answer 4

1. Can obtain organisms with any desired traits.

2. Can obtain higher yields.

Question 5

What are the disadvantages of selective breeding

Answer 5

1. It takes a long time for the process to complete.

2. It only works if an organism reproduces sexually.

Question 6

Why are crops selectively bred

Answer 6

• To give them better yields
• To make them resistant to certain diseases
• To make them resistant to pests.
• To have a better balance of nutrients.

Question 7

Why are Animals selectively bred

Answer 7

• To make them resistant to diseases.
• To increase the production of food.
• To produce thicker fur
• To produce more offspring

Question 8

What is Cloning

Answer 8

This is the process of producing genetically identical offspring

Question 9

What is the technique used to clone plants

Answer 9

• Cuttings

- Micropropagation

Question 10

What are the general steps in micropropagation

Answer 10

1. Explants are collected using Forceps.
2. They are trimmed to about 0.5mm - 1mm.
3. They are sterilized to kill any micro-organisms present on the plant.
4. Then transfer the explants into an Agar medium that is sterilized.
5. Then the shoots will grow and they should be transferred to a different medium.
6. The roots will then grow, producing plantlets.
7. Then transfer the plants to a greenhouse.

Question 11

What are the advantages of Micropropagation

Answer 11

1. A Large number of plants can be produced quickly.
2. A genetic modification can be passed on to many plants by genetically modifying a few plants.
3. The plants can be grown at any time of the year.
4. A Large number of plants can be stored very easily by keeping them frozen.
5. Plants that are difficult to be created by seeds can be formed using this method.

Question 12

What are the problems in Cloning animals

Answer 12

1. Requires a Permit

2. Has Ethical problems.

Question 13

What are the steps in Cloning animals

Answer 13

1.