Chapter 13 Flashcards
What makes the Y chromosome different from other chromosomes?
Tiny with fewer genes
Only found in males
Sperm, but not eggs
Not fully homilies with X chromosomes
How many chromosomes does each human somatic cell contain?
46
X and y are what chromosomes?
Sex chromosomes
All non-sex chromosomes are what?
Autosomes
2 chromosome sets
Somatic cells
Makes up everything
Diploid
Gametes
1 single set of chromosomes
Sex cells
Haploid
Do all animals have the same number of chromosomes?
No
Gametes are diploid or haploid
Haploid
Gametes are formed by the process of?
Meiosis
Draw a diagram of the human life cycle
See ch. notes
In animals, only gametes are haploid and everything else is diploid. Is this true for Protists, fungi and plants?
No
Meiosis is preceded by what?
Duplication
How many cell divisions does meiosis have?
2
How daughter cells does meiosis result in?
4
Portions of homologous chromosomes (not sister chromatids) are swapped during prophase 1
Crossing over
No synapsis
2 daughter cells
Identical to parent cell
Mitosis
Occurs during prophase
4 daughter cells
Genetically different from parent cell
Meiosis
Homologous chromosomes seperate
Meiosis 1
Chromosomes condense
Prophase I
Tetrads lineup along the metaphase plate
Metaphase I
Homologous chromosomes seperate
Anaphase I
Chromosomes father at 2 ends of the cell
Telophase and cytokenesis I
Sister chromatids seperate
Meiosis II
Chromatids condense
Prophase II
Chromatids lineup
Metaphase II
Chromatids pull apart
Anaphase II
New cell is formed
Telophase and cytokinesis II
