Selective Breeding: Process and Outcomes

Selective breeding involves humans breeding plants and animals for specific traits, such as higher yields or disease resistance. The process is illustrated using dairy cows, where cows with high milk yields and good temperaments are bred. However, selective breeding can reduce genetic diversity, leading to potential issues like vulnerability to diseases and inherited defects, as seen in certain dog breeds like bulldogs.

What is the primary goal of selective breeding?

• To increase genetic diversity

• To produce organisms with specific desirable traits

• To create new species

• To eliminate all diseases

In the example of dairy cows, which traits are primarily selected for?

• Resistance to cold climates

• Brightly colored fur and long horns

• Fast growth and large size

• High milk yield and good temperament

What is a potential risk of reduced genetic diversity due to selective breeding?

• Increased resistance to all diseases

• Improved overall health of the population

• Higher adaptability to environmental changes

• Greater likelihood of population extinction if a new disease emerges

What is inbreeding, and why is it a concern in selective breeding?

• Breeding between different species, leading to hybrid vigor

• Breeding organisms with different traits, leading to diversity

• Breeding organisms in different environments, leading to adaptation

• Breeding closely related organisms, leading to inherited defects

Which breed is mentioned as being prone to breathing difficulties due to selective breeding?

• Labrador Retriever

• Siberian Husky

• German Shepherd

• Bulldog