Cell Repro Quiz Flashcards
Why do cells undergo mitosis and meiosis?
To creat identical daughter cells
Meiosis
The process of making egg and sperm cells
Mitosis
Distributes DNA to each new cell; identical daughter cell
Interphase
First
Normal cellular activity occurs, chromosomes are copied prior to prophase. DNA is in chromatin… Looks like spaghetti.
Duplicating
Prophase
Nuclear envelope begins to dissolve, leaving the double chromosomes bare. Each separate chromosome is now called a chromatid. These are attached to each other at the centromere.
(crossing over)
Metaphase
Chromosomes move to the middle
Anaphase
Chromosomes are split by spindles
Telophase
New cell wall (w/ plants)
New nuclear envelope
Mitosis: the number of chromosomes in the beginning cells and ending cells
Beginning: 46
End: 46
Meiosis: the number of chromosomes in the beginning cells and ending cells
Beginning: 46
End: 23
Each chromosome has….
prophase
Two chromatids
Cross over
Mom and dad chromosomes get tangled together, and trade equal sections of DNA
Prophase 2
No doubling the DNA but other than that the same is prophase 1
Mitosis number of divisions
2
Meiosis number of divisions
4
Zygote
A eukaryotic cell formed by a fertilization event between two gametes