DNA&
Chromosomes
Chromosomes
What is the genetic material in cells?
DNA
What phase is the longest part of the cell cycle?
Interphase
What stage do chromosomes line up in the middle?
Metaphase
How many parents are needed for asexual reproduction?
One
What is it called when cells become specialized?
Differentiation
How many chromosomes do human body cells have?
46
What is the phase where DNA is copied?
S phase
What stage do chromatids separate?
Anaphase
What type of reproduction produces identical offspring?
Asexual reproduction
What is the first cell formed after fertilization?
Zygote
What protein does DNA wrap around?
Histones
What happens during cytokinesis?
Daily Double 1
Cytoplasm divides
What stage forms two new nuclei?
Telophase
What process do bacteria use to reproduce?
Binary fission
What type of cell can become many different cell types?
Stem cell
What is one half of a duplicated chromosome called?
Chromatid
What is the purpose of mitosis?
To create identical cells
What stage does the nucleus break down?
Daily double 2
Prophase
What type of reproduction uses two parents?
Sexual reproduction
Which layer becomes muscles and bones?
Mesoderm
What structure holds sister chromatids together?
Centromere
Why must DNA be tightly packed before division?
So it can be evenly separated
What ensures chromosomes are pulled apart correctly?
👉 Answer: Spindle fibers
Why is sexual reproduction beneficial?
Genetic variation
What determines which genes are expressed?
Cell type and location