Selective Breeding/Genetic Engineering 2025

Multiple Choice

Which of the following best describes the main goal of selective breeding?

• To produce offspring with the desired traits of both parents

• To allow animals to breed randomly

• To decrease the variety of traits in a population

• To prevent domestication of animals

Open Ended

Why do you think humans practice selective breeding, and what could be some possible benefits or drawbacks of this process?

Multiple Choice

Which of the following is NOT an example of selective breeding?

• Intentionally mating two dogs to achieve a specific trait

• A farmer saving seed from a hearty crop to replant

• Dogs bred for hunting or competition

• Allowing animals to mate randomly in the wild

Multiple Choice

Which traits were combined to produce the bullmastiff through selective breeding?

• Aggression and speed

• Strength and companionship

• Strength, speed, and aggression

• Speed and companionship

Multiple Choice

What is the result of breeding Brahman cattle with English shorthorn cattle?

• Cattle with poor beef and poor heat resistance

• Cattle with good beef and poor heat resistance

• Cattle with good beef and good heat resistance

• Cattle with poor beef and good heat resistance

Fill in the Blank

Selective breeding in crops involves choosing seeds from plants with the most desirable ___ to plant for the next generation.

Open Ended

Describe one advantage of selective breeding in lions and tigers, as seen in ligers.

Multiple Choice

How did the liger appear?

• By selective breeding between two lions

• By selective breeding between two tigers

• By breeding a lion father and a tiger mother

• By genetic engineering

Multiple Choice

Why do people selectively breed animals and plants?

• To make them smaller and weaker

• To make them grow bigger, faster, prettier, and stronger

• To reduce crop yield

• To make them reproduce less

Multiple Choice

Which of the following are benefits of selective breeding?

• Higher crop yield

• Animals that grow more meat, milk, and eggs

• Friendlier and prettier pets

• All of the above

Fill in the Blank

Selective breeding can lead to loss of genes in a population, animal discomfort, and ___.

Open Ended

Describe how genetic engineering has been used to produce human insulin using bacteria.

Multiple Choice

What is a potential risk of replacing bad genes with healthy genes in humans through genetic engineering?

• The person may develop a worse disease due to the new gene

• The person will never get sick again

• The process is always successful without side effects

• Healthy genes can cure all diseases

Multiple Select

Which of the following are benefits of inserting a weed resistant gene into crop plants?

• Farmers can spray weed killer without harming crops

• Crops grow better and bigger

• Weeds become resistant to herbicides

• Crops require less water

Fill in the Blank

Bt gene is inserted into crops to make them resistant to ___

Open Ended

Compare the growth characteristics of genetically engineered salmon and farm salmon.

Fill in the Blank

Genetically engineered crops can be designed to grow in ___ environments.

Multiple Choice

What is the main purpose of injecting genes into pigs' DNA, as described in the image?

• To make pigs grow faster

• To produce human-like organs for transplantation

• To improve pigs' taste and nutrition

• To make pigs resistant to diseases

Multiple Choice

Why do humans genetically engineer mice to grow human ears?

• For medical research

• For cosmetic purposes

• To improve hearing in mice

• To study genetic mutations

Multiple Select

Which of the following are potential benefits of genetically engineered vaccines compared to traditional vaccines?

• They may be safer

• They use live viruses

• They do not use live viruses

• They are less effective

Multiple Choice

Which of the following is NOT listed as a pro of genetic engineering in the image?

• Making crops with better taste

• Producing new foods

• Helping cure certain diseases

• Causing negative traits to increase

Fill in the Blank

Humans have made crops with better taste, nutrition, and ___ rate.

Multiple Choice

Which of the following is a potential negative consequence of genetic engineering in crops as described in the slides?

• Crops may become allergenic to people

• Crops may require more water

• Crops will always taste worse

• Crops will grow slower

Open Ended

How does selective breeding lead to the development of strains with desired characteristics over generations?

Drag and Drop

UNIT 3. ​

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has used artificial selection or ​

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to encourage organisms to possess certain ​

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.

Drag these tiles and drop them in the correct blank above

Man

selective breeding

desirable traits

Open Ended

What is selective breeding?