Cell Cycle
Centriole
During this phase of mitosis, the nuclear membrane reforms.
Independent assortment occurs during this phase of meoisis.
Metaphase I
The male chromosome is ________.
XY or hemizygous
Crossover points not lining up correctly results in ________ or ________.
Duplication or deletion
This phase checks if the mitotic spindle is ready for mitosis.
G2
__________ chromosomes are pulled apart during anaphase.
At the end of Meiosis I, cells are __________.
Haploid
Although Mendel never saw a chromosome, he mathematically determined that traits are ____________.
presented in pairs
An inactive X chromosome in a cell with more than one X chromosome is referred to as _______.
a barr body
MPF activity is dependent on ________.
Cyclin availability/production
Spindle fibers attach to this location of the chromosome in metaphase.
Centromere
Crossing over occurs in which stage of meiosis.
Prophase I
The recessive allele has no noticeable effect on the phenotype of the __________.
Heterozygote
If a daughter has a father who expresses the phenotype of an X-linked recessive trait, in order for her to also express the trait her mother must ___________.
Express the trait herself or be a carrier.
Cancer cells can metastasize because they are ___________.
anchorage independent
In cytokinesis, microtubules _______ to pinch the contractile ring around the cell.
shorten
Independent assortment of human chromosomes results in this many chromosome combinations.
223
This occurs when the expression of alleles at one gene locus affect the phenotypic expression of alleles at a second gene locus
Epistasis
This reverses a segment in a chromosome.
Inversion
As cyclin accumulates, it combines with this to form MPF.
CdK
DNA Polymerase activity is highest during this checkpoint of the cell cycle.
S phase
Trisomy 21 is a result of this process during meiosis.
Nondisjunction
These traits show continuous variation.
Polygenic
Genes A and B have a recombination frequency of 18%. Genes A and C have a recombination frequency of 30%. Draw the recombination map.
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