Species Interbreeding and Genetics Concepts

The video explores the concept of hybrid species, such as growler bears, and the biological species concept defined by Ernst Mayr. It discusses mechanisms of reproductive isolation, including pre-zygotic and post-zygotic barriers, and the role of DNA in hybridization. The video also covers human and Neanderthal interbreeding, highlighting the presence of Neanderthal DNA in modern humans. It concludes with a discussion on the rarity and debate surrounding hybrid species creation.

What is a growler bear?

• A type of grizzly bear

• A hybrid of a grizzly and polar bear

• A species of polar bear

• A fictional animal

What is a liger?

• A fictional creature

• A type of tiger

• A species of lion

• A hybrid of a lion and a tiger

Which concept did Ernst Mayr introduce?

• Natural Selection

• Biological Species Concept

• Genetic Drift Theory

• Mendelian Inheritance

What is the main idea behind the biological species concept?

• Species are defined by their habitat

• Species are defined by their diet

• Species are defined by their ability to interbreed and produce viable offspring

• Species are defined by their physical appearance

What is a pre-zygotic mechanism?

• A barrier that prevents different species from mating

• A type of hybrid species

• A process that occurs after an animal gets pregnant

• A genetic mutation

What is an example of a post-zygotic mechanism?

• A mountain separating two species

• Offspring that cannot reproduce

• Physical incompatibility

• Different mating calls

What role does DNA play in species interbreeding?

• It is irrelevant in hybrid species

• It prevents all species from interbreeding

• It determines the physical appearance of hybrids

• It acts as an instruction manual for cells

Why is creating new species by breeding random animals rare?

• Because it requires specific environmental conditions

• Due to the complexity and precision needed in DNA matching

• Because it is illegal in most countries

• Due to the lack of interest in scientific communities

How much Neanderthal DNA do modern humans have?

• 10%

• 0%

• 2%

• 4%

What is the significance of human and Neanderthal interbreeding?

• It proves that all species can interbreed

• It indicates that Neanderthals were not a separate species

• It demonstrates that similar species with similar DNA can interbreed

• It shows that different species can never interbreed