DNA,Cell Cycle, Division,Mitosis, Meiosis, Spermatogenesis and Homologous Chromosomes

The sister chromatids are moving apart
The nucleolus begins to fade from view
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A new nuclear membrane is forming around the chromosomes
The cytoplasm of the cell is being divided
The chromosomes become invisible
The chromosomes are located at the equator of the cell
The nuclear membrane begins to fade to view
The division (cleavage) furrow appears
The chromosomes are moving towards the poles of the cell
Chromatids line up along the equator
The spindle is formed
Chromosomes are not visible
Cytokinesis is completed
The cell plate is completed
Chromosomes are replicated
The reverse of prophase
The organization phase
What phase are the 2 daughter cells in as a result of mitosis
During what phase of mitosis do centromeres divide and the chromosomes move toward their respective poles
What is the phase where chromatin condenses to form chromosomes
What is the name of the structure that connects the two chromatids
In a chromosome pair connected by a centromere, what is each individual chromosome called
Mitosis & Cytokinesis
What are the two parts of cell division
Spindle fibers
What structure forms in prophase along which the chromosomes move
Which phase of mitosis is the last phase that chromatids are together
Which phase of the cell cycle is characterized by a non-dividing cell
Spindle fibers
What structure is produced when protein fibers radiate from centrioles
Cell plate
What forms across the center a cell near the end of telophase
The period of cell growth and development between mitotic divisions
What is the phase where cytokinesis occurs
Chromosomes are held together by the centromere
How are the chromosomes held together
What is the process of cell division called
Mitosis has how many phases
What is the process called when the cytoplasm divides
The cell structures made by the centrioles that are involved in moving chromosomes to opposite sides of the cell during cell division are called what
5-carbon sugar, Nitrogen containing base and Phosphate group
DNA nucleotide made up of what
The form of cell division by which gametes, with half the number of chromosomes are produced
What is Meiosis
Diploid (2n) to Haploid (n)
What happens in Meiosis
sexual reproduction
What kind of reproduction is Meiosis
Meiosis 1 and Meiosis 2
What are Meiosis’s two divisions
What do the sex cells do to produce gametes (sperm or egg)
Testes of men or ovaries of women
What does Meiosis only occur in
23 from the male and 23 from the female
Gametes have half the number of chromesomes which means what
when a cell has only 1 set of chromosomes (23)
What does Haploid mean
when a cell has 2 sets of chromosomes (46- 1 set from man, 1 set from woman)
What does Diploid mean
The fusion of a sperm and egg to form a zygote
What is Fertilization
A fertilized egg
What is a zygote
the chromosomes replicate
What happens to the chromosomes in Interphase 1
2 indentical sister chromatics attached at their centromeres
What does each duplicated chromosome consist of in Interphase 1
Centriole pairs
What also replicates
If Interphase 1 doesn’t start as chromatin what does it start as
cell division that reduces the chromosome number by one-half (from 46 to 23)
What is Meiosis 1
Prophase 1, Metaphase 1, Anaphase 1, Telophase 1
What are the 4 phases in Meiosis 1
The longest and most complex phase
What is the first thing described about Prophase 1
The chromosomes condense
What happens to the chromosomes in Prophase 1
Homologous chromosomes come together to form a tetrad
What happens when synapsis occurs in Prophase 1
Two chromosomes of 4 chromatids
What is an Tetrad in Prophase 1
A pair of chromosomes that are similar in shape and size
What are homologous chromosomes
Maternal for the mother and Paternal for the father
What are the pair(s) of chromosomes called
Carry genes controlling the same inherited traits
What do Homologous pairs do
A position of a gene
What is locus
the same position on homologous
What is each locus in
2 homologous
Each homologous set is made up of what
23 sets
How many sets of homologous chromosomes do humans have
22 pairs
How many pairs of autosomes
1 pair
How many pairs of sex chromosomes

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