The first portion of the mitotic phase.
What is Karyokinsesis?
This checkpoint determines whether all conditions are favorable for cell division to proceed.
What is the G1 Checkpoint?
Sexual reproduction requires the union of two specialized cells called _____.
What are gametes?
In which of these phases of mitosis does the nuclear envelope break down?
What is the prophase?
Spindle microtublules that do not engage the chromosomes are called ____.
The physical separation of the cytoplasmic components in two daughter cells.
What is cytokinsesis?
Also known as the spindle checkpoint because it determines whether all the sister chromatids are correctly attached to the spindle microtubules.
What is the M Checkpoint?
The tight pairing of the homologous chromosomes.
What is synapsis?
what phase of the cell cycle does this image reprsent?
What is the M Phase?
HGH (Human Growth Hormone)
The "upward phase" of mitosis.
What is the anaphase?
The two groups of proteins termed as positive regulators.
Cyclins and Cyclin-dependent kinases.
Large protein assemblies located at intervals along the synaptonemal complex.
What are recombination nodules?
what part of the cell cycle does the far right section of the diagram represent?
What is the S Phase
Males are said to be _____ because they only have one allele for any X-Linked characteristic?
hemizygous
Each sister chromatid develops a protein structure called a _____ in its centromeric region.
What is a Kinetochore?
Rb and other proteins that negatively regulate the cell cycle are sometimes called ____.
What are tumor supressors?
In meiosis II, two sister chromatids will separate and create four _____.
Haploid daughter cells.
During metaphase I the homologous chromosomes are arranged at the ______.
What is the metaphase plate?
Haploid cell that can produce a haploid multicellular organism or can fuse with another spore to form a diploid cell.
What is a spore?
During telophase of mitosis, the chromosomes reach the opposite poles and begin to ______.
What is decondensing?
Genes that cause the cell to become cancerous.
What are oncogenes?
Interkinesis lacks a(n) _____ , so chromosomes are not duplicated.
What is an S Phase?

What kind of chromsome is shown above?
What is a duplicated chromosome?
Two duplicated homologous chromosomes bound together by chiasmata during prophase I.
What is a tetrad?