[Campbell Biology P.285] Based on Figure 12.5, point 2, and the accompanying text, how many ... | Practice Question

Based on Figure 12.5, point 2, and the accompanying text, how many chromatid arms does the duplicated chromosome depicted there typically have?

  • A: One
  • B: Two
  • C: Three
  • D: Four

Explanation

The text states that an unduplicated chromosome has 'two arms'. A duplicated chromosome, as shown in Figure 12.5 point 2, consists of two sister chromatids. Since each chromatid has two arms one on each side of the centromere , a duplicated chromosome with two sister chromatids will have a total of four chromatid arms.