Skip to content
MathsGenie logo
Open app

Course home

  1. A Level
  3. Biology OCR A
  5. Question bank

Foundations in biology

EasyMedium
1234567891011121314151617181920212223242526272829303132333435363738394041
Question 30

During cell division, the quantity of genetic material in human cells changes as the cell goes through different phases.

Consider the following sequences describing the DNA content (relative to the haploid chromosome number, nnn) before, during, and after different types of cell division:

  • Sequence W: n→2n→nn \to 2n \to nn→2n→n
  • Sequence X: 2n→4n→2n2n \to 4n \to 2n2n→4n→2n
  • Sequence Y: 2n→4n→2n→n2n \to 4n \to 2n \to n2n→4n→2n→n
  • Sequence Z: 4n→2n→n 4n \to 2n \to n\,4n→2n→n

Which row in the table below correctly identifies the sequences for mitosis and meiosis in human cells?

MitosisMeiosis
ASequence XSequence W
BSequence YSequence X
CSequence XSequence Y
DSequence ZSequence Y

Mitosis: Sequence X; Meiosis: Sequence W

Mitosis: Sequence Y; Meiosis: Sequence X

Mitosis: Sequence X; Meiosis: Sequence Y

Mitosis: Sequence Z; Meiosis: Sequence Y

Foundations in biology Questions

  1. A Level
  2. /Biology
  3. /Foundations in biology