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.

  • AReproductive control
  • BCharacteristic selection
  • CSelective breeding
  • DGenetic engineering
  • ENatural selection

Q2:

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

  • AHigh milk production
  • BLarger muscle mass
  • CAggressiveness
  • DDark fur
  • ELow fertility

Q3:

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

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

Q4:

State the process being described:

Humans choose organisms that have useful characteristics to be bred.

  • AArtificial selection
  • BCharacteristic selection
  • CNatural selection
  • DSelective choice
  • EGenetic engineering

Q5:

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

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

Q6:

How does selective breeding affect the variation within a population?

  • AIt reduces it.
  • BThe variation stays the same.
  • CIt increases it.

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 population.
  • 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 species.
  • EInbreeding is when individuals are bred with organisms that descended from the same common ancestor.

Q8:

The diagram provided shows a simplified process of selective breeding in banana plants.

What characteristic has been selected for here?

  • AColor of tree
  • BMass
  • CHeight
  • DLeaf production
  • EBanana production

Which plants from the second generation should be bred to get the best outcome?

  • AB and C
  • BB and D
  • CA and C
  • DC and D
  • EA and B

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