Karyotypes, Meiosis and mitosis Flashcards
What is a Karyotype?
A man made image with an organisms chromosomes paired by length and banding
What is a Karyotype used for?
Used to determine chromosomal disorders
What is Monsomy caused by?
By a Nondisjunction, where the chromosomes Seperate improperly
Why does crossing over not occur during Mitosis?
Does not occur in Mitosis because it makes body cells which must be identical
What’s the difference between autos ones and Sex Chromosomes?
Sex chromosomes determine gender while autosomes determine anything else but gender.
The bands that we see on chromosomes are created by _______.
Adenine
What’s a haploid?
A sperm and egg/ single set of chromosomes
What’s a diploid?
2 complete sets of chromosomes
What’s a zygote?
A fertilized egg
What are sex chromosomes?
2 types of chromosomes that determine gender (XX, XY)
Nondisjunction is….
When the spindle fibers do not correctly Seperate the chromosomes during anaphase
What is a tetrad?
4 sister chromatids interwine
What is a sister chromatid?
Copies of the same chromosome bound by a centromere
What is a homologous chromosome?
Chromosomes that are the same length and contain the same gene types.
Mitosis starts with a _______ cell and end with a _______ cell.
Diploid; diploid
