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Biology 101 Ch. 12 - Meiosis
Professor Abu's Class
13
Biology
Undergraduate 1
10/29/2012

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Cards

Term
Describe Homologous Chromosomes
Definition
two sets of two 
Term
Describe autosomes
Definition
non-sex chromosomes
Term
Describe an allele
Definition
different versions of the same gene
Term
Describe how homologs are the same and different from each other
Definition
homologs may carry the same gene but different alleles
Term
Describe a Karyotype
Definition
# of chromosomes present
Term
What organisms do not contain homologs?
Definition
haploid
Term
Describe ploidy
Definition

# of same genes

2n = I I (same) n = I i (one of each)

Term
Describe a tetrad
Definition

four chromosomes

two homolog pairs

Term
What type of division is Meiosis called?
Definition
reduction division
Term
What happens in Meiosis one?
Definition
homologs separate
Term
Describe early Prophase I
Definition

chromosomes condense

spindle apparatus forms

nuclear envelope dissolves

Synapsis between homologs

Term
Describe late Prophase I
Definition

Synaptonemal Complex holds homologs

crossing over occurs, creates chiasmata

Term
Describe Metaphase I
Definition

each tetrad lines up separately

order is random

 

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