# _____ Name ____KEY_____________________
Mrs. G-M 200 Bio
Date ___________
Period _________
200 Bio Meiosis Quiz Review
1. Where does meiosis occur? In (germ cells of) ovaries & testes
2. What does meiosis produce (in males & females)? Sperm in males & eggs in
females (gametes)
3. What are homologous chromosomes? Chromosomes that carry similar
information (ex. hair color). You get one from mom & one from dad.
4. What is a tetrad? When homologous chromosomes are double-stranded and in
pairs (made of 4 sister chromatids); formed during synapsis which occurs
during prophase 1
5. What happens during interphase (before meiosis)? DNA replicates (copies
itself)
6. Does replication occur before meiosis 2? no
7. How many chromosomes do humans have in body (somatic) cells? Are these cells
diploid or haploid? 46; diploid (have 2 of each type of chromosome)
8. How many chromosomes are in human sperm and eggs (gametes)? Are these cells
diploid or haploid? 23; haploid (have 1 of each type of chromosome… ½ the
original # that was in the “parent” cell)
# _____ Name ____KEY_____________________
Mrs. G-M 200 Bio
Date ___________
Period _________
9. What is fertilization? the fusion/joining of sperm & egg (resulting in a zygote
which will develop into the offspring)
10.
Why do gametes (sperm and eggs) need to be haploid (have ½ the number of
chromosomes as regular body cells)? So that the zygote/fertilized
cell/offspring has the right # of chromosomes (doesn’t have double the # of
chromosomes)
11. Draw a diagram of each phase of meiosis & explain what is happening at each
phase. Include interphase (before meiosis). Use extra paper if necessary.
 Make sure to label: meiosis 1, prophase 1, metaphase 1, anaphase 1, telophase 1/
cytokinesis 1, meiosis 2, prophase 2, metaphase 2, anaphase 2, telophase 2/
cytokinesis 2
# _____ Name ____KEY_____________________
Mrs. G-M 200 Bio
Date ___________
Period _________
*homologous chromosomes
join (synapsis) forming tetrads
(tetrad = 4 chromatids)
*Genes may swap = crossing
over
Cell membrane pinches in,
nuclear membrane reforms,
chromosome number reduced
to 1/2 (haploid) for first time
cytokinesis 1
̭individual
sister
cytokinesis 2