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Bio Lab Quiz #6

Terms in this set (14)

After completing this exercise, you will
1. be able to describe the phases of meiosis
2. be able to describe the similarities and differences between mitosis and meiosis
3. know the different mechanisms of cytokinesis
4. know the terms in bold print
Meiosis is the nuclear division that occurs in sexually reproducing organisms. In animals, it is associated with gamete production that precedes sexual reproduction. This process is specific to _____ (a type of stem cell)
germ cells
Germ cells complete the interphase portion of the cell cycle just as somatic cells do, replicating their DNA during S phase. However, these ____ cells then undergo two consecutive nuclear divisions that result in the formation of 4 non-identical __ cells
diploid (2 sets of chromosomes), haploid (1 set of chromosomes)
What happens during Meiosis 1? (chromosomes that look alike and carry genes for the same traits?
the homologous chromosomes are separated
Prophase 1: homologous chromosomes pair up and bind to one another in a process called ____
synapsis
Prophase 1: ______ may occur at these sites, resulting in an exchange of corresponding segments of DNA between non-sister chromatids
Crossing-over
Metaphase 1: Chromosome pairs align along the ____
cell equator
Anaphase 2: Sister chromatids are separated, becoming _____, and begin to move toward opposite poles of the cell
daughter chromosomes
____ occurs in regions where the DNA codes for the same traits.
Synapsis
Diploid number equals ___ using two yellow and two red chromosomes are non-homologous to the yellow chromosomes since they carry different sets of genes
4
Meiosis of the germ cells in animals produces the gametes during the process of ___
gametogenesis
_____ is the type of gametogenesis found in the testes of males
spermatogenesis
____ is the process of meiosis that begins in the ovaries of females.
Oogenesis
Note that Meiosis 1 is halted at prophase 1 when a female is an ___
embryo
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