Worksheet: Selective Breeding

In this worksheet, we will practice explaining the process of selective breeding, and discussing its advantages and disadvantages.

Q1:

State the process being described:

Humans repeatedly breed plants and animals to create desired or useful organisms.

  • ANatural selection
  • BCharacteristic selection
  • CReproductive control
  • DSelective breeding
  • EGenetic engineering

Q2:

What primary characteristic would be selected for when breeding dairy cows?

  • AAggressiveness
  • BDark fur
  • CLow fertility
  • DLarger muscle mass
  • EHigh milk production

Q3:

How does selective breeding affect the number of different alleles in a population?

  • AThe number of different alleles stays the same.
  • BIt increases them.
  • CIt reduces them.

Q4:

State the process being described:

Humans choose organisms that have useful characteristics to be bred.

  • ANatural selection
  • BGenetic engineering
  • CSelective choice
  • DArtificial selection
  • ECharacteristic selection

Q5:

Which of the following is not a step in selectively breeding an organism?

  • ASelecting a characteristic that is important/useful
  • BSelecting offspring to have their DNA genetically modified
  • CBreeding individuals with an important/useful characteristic
  • DBreeding selected organisms until there is a population of organisms with the chosen characteristic
  • ESelecting the best offspring from the breeding pair

Q6:

How does selective breeding affect the variation within a population?

  • AIt reduces it.
  • BIt increases it.
  • CThe variation stays the same.

Q7:

Artificially selecting organisms can lead to inbreeding. Which of the following best describes inbreeding?

  • AInbreeding is when individuals are bred with members of the same species.
  • BInbreeding is when individuals are bred with more than one other individual.
  • CInbreeding is when individuals are bred with close relatives.
  • DInbreeding is when individuals are bred with members of the same population.
  • EInbreeding is when individuals are bred with organisms that descended from the same common ancestor.

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