The Science Behind Selective Breeding and Its Impacts

The video tutorial explains selective breeding, a process where humans breed plants and animals for desired traits. It covers examples like disease-resistant crops and gentle-natured dogs. The process involves selecting parents with desired traits, breeding them, and repeating over generations. Issues like inbreeding and genetic defects are discussed, along with ethical concerns. The video concludes with a review and an introduction to genetic engineering.

What is the main goal of selective breeding?

• To eliminate all genetic defects

• To produce animals and plants with desired traits

• To increase genetic diversity

• To create new species

Which of the following is an example of selective breeding?

• Creating a new species of fish

• Cross-breeding wild animals

• Developing crops resistant to diseases

• Introducing a new animal to an ecosystem

What is the first step in the selective breeding process?

• Introducing genetic mutations

• Allowing natural selection to occur

• Selecting parents with desired traits

• Breeding the selected parents

Why might selective breeding lead to inbreeding?

• It increases genetic diversity

• It introduces new alleles into the population

• It focuses on breeding individuals with similar traits

• It encourages random mating

What is a potential consequence of inbreeding in selectively bred animals?

• Improved overall health

• Higher resistance to diseases

• Increased genetic diversity

• Increased risk of genetic defects

How does selective breeding affect genetic variation in a population?

• It increases genetic variation

• It randomly alters genetic variation

• It has no effect on genetic variation

• It greatly reduces genetic variation

What is an ethical concern related to selective breeding?

• It can lead to the extinction of species

• It may cause defects and health issues in animals

• It is a natural process

• It always results in healthier animals

Which of the following is NOT a result of selective breeding?

• Development of disease-resistant crops

• Breeding dogs with gentle natures

• Increased milk production in cows

• Creation of new animal species

What is the main reason for the loss of alleles in a population due to selective breeding?

• Random mutations occur frequently

• All individuals are allowed to breed

• Only individuals with desired traits are bred

• Natural selection is not involved

Which animal is mentioned as having health issues due to selective breeding?

• Siamese cats

• Pugs

• Parrots

• Labradors