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IB Biology SL A4.1.3 Selective breeding Question Bank

Practise IB Biology SL A4.1.3 by identifying selective breeding and explaining how repeated human choice changes domesticated populations.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Identify selective breeding in crops, cattle or dog breeds as artificial selection.
  • Explain how repeated selection of heritable traits changes domesticated populations over time.

A4.1.3—Evidence from selective breeding question 1

[Maximum number: 1]

Jersey (Bos taurus) is a breed of cattle. Cows of this breed produce higher milk yields than cows from other cattle breeds.

Figure for Question A4.1.3—Evidence from selective breeding question 1 — IB Biology SL

What has caused this breed to produce higher milk yields than other cattle breeds?

A

Natural selection

B

Selective breeding

C

Adaptive radiation

D

Random mutations

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