The Cell Cycle & Mitosis — Drills · Grade 7 Science
Chapter: Genes, Cell Division & HeredityWhat these drills covers
By the end of The Cell Cycle & Mitosis you should be able to:
- I can explain the cell cycle & mitosis.
- I can use evidence, a model, and stated assumptions to support a biological explanation.
4 questions, multiple choice, numeric and written answer, each with a worked explanation.
Vocabulary used: cell cycle, replication, sister chromatids, mitosis, daughter cell.
Problem 1
What is the modeled chromosome set after normal mitosis?
- Half in every daughter
- The corresponding starting set in each daughter
- No DNA
- Double forever
Answer and explanation
The corresponding starting set in each daughter
Normal mitosis distributes corresponding sets after replication.
Problem 2
Five cells each divide once into two; none are lost. How many daughter cells result?
Answer and explanation
10 cells
5×2=10 daughter cells under the stipulated model.
Problem 3
Why is copying needed before the modeled division?
Answer and explanation
It provides corresponding genetic information for the daughter nuclei rather than merely splitting the original information into incomplete portions.
Problem 4
Why is mitosis not automatically gamete formation?
Answer and explanation
Mitosis normally preserves the studied chromosome set; meiosis reduces the set in the sexual reproduction model.