Selective Breeding Basics
What is selective breeding?
Humans choosing organisms with desired traits to reproduce.
Which process happens without human involvement?
Natural selection.
What do genes control?
traits.
If purple flowers increase and white flowers disappear over generations, what happened?
Genetic diversity decreased.
Why do farmers selectively breed chickens?
To increase egg or meat production.
Which trait is most likely selectively bred by humans?
Speed in horses for racing.
Which process involves human choice of parents?
Selective breeding.
If a trait is dominant, how often does it show up?
Whenever at least one dominant allele is present.
If only certain plants reproduce, what happens to the population’s traits?
Those traits become more common.
What is a positive long-term effect of selective breeding in agriculture?
What is a positive long-term effect of selective breeding in agriculture?
What is another name for selective breeding?
Artificial selection.
Which process usually increases survival in nature?
Natural Selection
Why can selective breeding lead to health problems?
Why can selective breeding lead to health problems?
What conclusion can be drawn when only purple flowers remain?
Selective breeding reduced variation
What is a negative effect seen in modern chickens?
Brittle bones and weakened immune systems.
Who controls reproduction in selective breeding?
Humans.
Why does selective breeding often reduce genetic diversity?
Only specific traits are chosen repeatedly.
Who was the winner of the 2023 Football National Championship game?
Michigan.
What does a 50/50 outcome of traits in puppies suggest?
a heterozygous cross
Why would breeding fungus-resistant strawberries help farmers?
Higher crop yield and less crop loss.
What is the main goal of selective breeding?
To produce organisms with desirable traits.
Which is an example of selective breeding: larger deer competing or humans choosing horses to mate?
humans choosing horses to mate.
Why don’t all selectively bred offspring show the same traits?
Genes are inherited in different combinations.
Why are hybrid plants often beneficial?
They combine multiple desirable traits.
Why does selective breeding not stop evolution?
populations still change over time.