Cell Cycle
The part of the cell cycle where DNA is copied
Interphase
In which stage does crossing over occur?
Prophase I
Which process makes body cells?
Mitosis
A cell containing one set of chromosomes.
Haploid
How many chromosomes are found in a normal human body cell?
46
What is the purpose of Mitosis
Growth, repair, and replacement of cells.
During which stage do homologous chromosomes line up in the middle of the cell?
Metaphase I
Which process produces gametes?
Meiosis
A pair of chromosomes, one from each parent.
Homologous chromosomes
How many chromosomes are found in a human egg or sperm?
23
What happens during cytokinesis?
The cytoplasm divides into two cells.
What separates during Anaphase I?
Homologous chromosomes
Which process includes crossing over?
Meiosis
Identical copies of a chromosome.
Sister chromatids
True or False:
DNA is replicated before both Meiosis I and Meiosis II.
False
What stage takes up most of a cell's life?
Interphase
What separates during Anaphase II?
Sister chromatids
Which process produces genetically identical daughter cells?
Mitosis
The exchange of chromosome segments between homologous chromosomes.
Crossing over
Why are siblings genetically different even though they have the same parents?
Crossing over, independent assortment, and random fertilization.
What happens if the cell cycle is not properly controlled?
Cancer can develop due to uncontrolled cell division.
How many genetically unique cells are produced after meiosis?
Four haploid cells
Name three differences between mitosis and meiosis.
Possible answers:
The random arrangement of homologous chromosomes during Metaphase I.
Independent assortment
If a body cell has 20 chromosomes, how many chromosomes will each gamete have after meiosis?
10