Mitosis - 13 Flashcards
What is a Karyotype
A visual representation of chromosomes in a cell
How do you make a karyotype
Take a blood sample
Treat the cells with mitogen, then colchicine, then stain
How many homologous pairs of chromosomes in each diploid cell
22 (called autosomes) and X and Y sex chromosomes
What is the purpose of mitosis
To create two genetically identical daughter cells
What are the phases of mitosis
Prophase Prometaphase Metaphase Anaphase Telophase
What happens in prophase
Chromosomes become visible
Sister chromatids pair up
Early spindle forms
What happens in prometaphase
Nuclear envelope dissolves
Spindle connects to centromeres at kinetochore microtubules
What happens in metaphase
Chromosomes line up along metaphase plate
What happens in Anaphase
Spindle tears apart sister chromatids
Kinetochores shorten
Non lengthen
Telophase
Cleavage furrow forms from a contractile rings and nuclear envelope forms in two cells
