Lecture 14 Class: Meiosis
While you wait for class to begin:
Fill in the following diagram with 2n = 4 chromosomes:
Starter:
Mitosis, in contrast to Meiosis:
A. Produces gametes
B. Requires a previous S phase
C. Is seen in gut epithelial cells
D. Has crossing over before anaphase
E. Results in haploid cells
Which of the following occurs during Meiosis 1?
A. Crossing over
B. DNA is replicated
C. Sister chromatids are separated
D. Maternal chromosomes line up independently from their homologues
Lecture 14 Page 1
Stage
Cells in G1
How many
Chromosomes look
chromosomes? like:
How many
sister
chromatids?
46
0
Ploidy?
2n or n
2n
In G2
Daughter cells
after mitosis
Daughter cells
after meiosis 1
Daughter cells
after meiosis 2
Which of the following is TRUE at the conclusion of meiosis I?
A. Homologous chromosomes are separated
B. Daughter cells are diploid
Which occurs in meiosis?
Which is related to independent assortment?
A. Duplication of chromosomes
B. Separation of sister chromatids
C. Separation of homologous chromosomes
In meiosis, tetrads of chromosomes are aligned at the equator of the spindle and their
alignment determines independent assortment during:
a. Metaphase 1
b. Metaphase 2
Lecture 14 Page 2
http://www.sumanasinc.com/webcontent/animations/content/mistakesmeiosis/mistakesmeiosis.html
Anuploidy
Monosomy
Trisomy
Lecture 14 Page 3