You've watched one cell become two, followed half a set of chromosomes from each parent, and read the code that tells a cell what to build. Here's all of it in one place, and two questions you'll have to answer for yourself.
Not started yet.
Bring the four Unit 4 lessons together, check which parts hold and which need a second read, and finish by writing about the difference between a gene and a chromosome and about how a chromosome number changes through meiosis and fertilization.
Every question here is tied to one of the four lessons and the hint says which one, so a wrong answer is directions to the right page and not a mark against the student.
The two written questions at the end are the real test of whether the unit landed. The chromosome-count question needs the idea of half a set, not a memorized number: sex cells carry half, and fertilization puts the full set back.
Read-aloud is not available in this browser. Try Chrome or Safari.
Before You Start
The words this lesson uses. Tap a card to see what it means, then come back to them whenever a question uses one.
Part One
Questions about the story you just read. Pick your answer straight off, or press Find it in the story if you would rather hunt for the sentence first.
Part Two
The word cards are at the top of this page. Look back at them as often as you need, then answer.