Multiple choice

Which of the following test-cross ratios indicates linkage?

  1. 1 : 1

  2. 1 : 2 : 1

  3. 9 : 3 : 3 : 1

  4. 7 : 1 : 1 : 7

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In this ratio, the parental type is more than the recombinant type.