Chapter 1 - Meiosis Flashcards
Homologous Chromosomes
Matching pair of chromosomes, similar in size and carrying information for the same gene
In what stage does DNA replicate?
Interphase
Tetrad
A pair of homologous chromosomes, each with two sister chromatids
Synapsis
The physical pairing up of homologous chromosomes during prophase I of meiosis
Crossing Over
The exchange of chromosome segments between homologous pairs during synapsis
At the beginning of ________ the chromosomes start to shorten and thicken.
Prophase I
In what phase does tetrads migrate toward the centre of the cell and align their centromeres across the middle of the cell?
Metaphase I
In __________ , homologous chromosomes move to opposite poles of the cell. At this point reduction division occurs.
Anaphase I
In __________, nuclear membranes begin to form around the chromosomes at each end of the cell and the cell begins to divide.
Telophase I
In Meiosis II are the sister chromatids identical?
No
What phase signals the beginning of the second division and the nuclear membrane dissolves and the spindle fibres begin to form?
Prophase II
____________, is identified by the arrangement of he chromosomes, each with two sister chromatids, across the middle of the cell.
Metaphase II
In ___________, sister chromatids separate and move to opposite poles of the cell. The nuclear membrane begins to form around the the chromatids, now called chromosomes.
Anaphase II
The final stage of Meiosis is ____________ . During this stage the second nuclear division is completed and the second division of cytoplasm follows.
Telophase II
In meiosis, the chromosome number of the daughter cells is _____ that of the _________ .
In meiosis, the chromosome number of the daughter cells is __half__ that of the ___ parent cell__.
