Problems with selective breeding include:

The image shows that the wolf is the ancestor to all the breeds of dogs shown below. How did this variation arise in a relatively short period of time?

• Through a selective breeding variety of dogs are developed from a common wolf ancestor.
• Through selective breeding or artificial selection, we can get new varieties in a short period as it is not a natural process.
• For the domestication of animals, such varieties are developed from wild varieties of animals.

Artificial selection is  ______.

• Artificial selection was discovered and explained by scientist Charles Darwin in the 19th century.
• But this process is not a new one and has been used for thousands of years ago.
• Ancient humans developed different breeds of animals and plants from wild ancestors. 
• They developed breeds of animals for domestication and plants for crop production.
• They were familiar with the results of inbreeding and hybridization.

Identify the type of selection in the given image.

• The variety of corns are developed through selective breeding.
• Ancient human developed such breeds of corn according to their needs and benefits.
• Through inbreeding and hybridization such varieties are developed.
• These varieties are able to grow in different soil and climatic conditions. Also, these are resistant for water loss. 

Identify the type of selection in the given image.

• The given image represents that different animals evolved from the same ancestors, and become different in appearance due to migrating to different geographical areas like India, China, America, and Europe.
•  In the second generation, these animals are more varied.
• These variations are caused by random mating in these animals. 
• These variations help these animals to adapt according to the environment.
• So, natural selection can be noticed here as a result of random mating.

Artificial selection is also known as________.

• Artificial selection is a process in which humans identify some desirable traits in organisms and through selective breeding, these traits are accumulated in the next generations of organisms.
• Natural selection is caused by random mating while artificial selection is caused by selective breeding.
• Human started the domestication of organisms that are beneficial to them many years ago. Some traits are useful for humans while some are not.
• So, the process of artificial selection allows human to grow plants with desirable traits and to keep the domestic animals with desired traits. 

In artificial selection ‘Selective Breeding’ is a necessary process due to earth’s population. Why is artificial selection important for humanity? Artificial selection has been a key factor in the evolution of:

Artificial selection has been a key factor in the evolution of:

What is an example of artificial selection?

 

Mutations do not cause variation.

At the metaphase plate, what is the maximum number of alignments?

How many chromosome combinations are present in any gamete?

A change in a gene or chromosome is called _______________.

____________________ is a process by which pieces of DNA break and recombine to produce new combinations of allele.

Crossing over takes place between