Meiosis Flashcards
(21 cards)
Gametes
Reproductive cells
Somatic cells
All body cells except reproductive
Locus
A gene’s specific location on chromosome
Homologous chromosomes (homologs)
23 pairs
1-1
2-2
3-3
Female chromosomes
XX
Male chromosomes
XY
Diploid cell
Two sets of chromosomes
2n=46
Haploid cells
1 set of chromosomes
Meiosis
Forms gamete cells
2—>1
Sister chromatids
2 copies of 1 chromosome and are associated with
Homologous pair
1 from mom 1 from dad
Interphase
Each chromosomes replicates
Prophase 1
Chromosomes begin condensing
Crossing over occurs
Chiasmata
X shaped regions where cross over occurred
Metaphase 1
Homologs arrange at metaphase plate
Anaphase 1
Homologs separate
Telophase 1 and cytokinesis
Each half of the cell has a complete haploid set of duplicated chromosomes
Result of end of telophase 2
4 haploid daughter cells
Independent assortment
Random orientation of pairs of homologous chromosomes at metaphase 1
Codominance
Both traits are seen
Incomplete dominance
Blend between both traits