Cell Division test Flashcards
3/13/25
What is a centromere?
where chromatids remain attached, holds sister chromatids together
What is a chromatid?
one half of a duplicated chromosome
What is a zygote?
a fertilized egg
If there are 26 chromatids, how many centromeres are there?
13
After mitosis, how do the daughter cells compare with the parent cell when the parent cell was in the G1 phase of its life.
identical
What phase of mitosis do centromeres uncouple, sister chromatids separate and move to the poles?
anaphase
If a drug that disrupts the spindle fibers function is given to a cancer patient, what phase does mitosis halt in rapidly dividing cells?
metaphase
A cells containing 94 chromatids are metaphase of mitosis eventually will produce 2 cells that have how many centromeres?
47
If a cells completes all stages of mitosis but never completes cytokinesis, what does it result in?
one cell with two nuclei
What phase of mitosis are chromosomes first visible in?
prophase
Replicated chromosomes aligned in the middle of the cell indicates the cell is in what phase of mitosis?
metaphase
What is next for the cell that has finished G1 phase of interphase?
S phase, DNA replication
When does DNA replication take place?
S phase of interphase
If a cells has half he amount of DNA as the other cells in the tissue that are undergoing mitosis, what phase of its life is the cell in?
G1 (hasn’t gone through DNA replication)
If an organism has 52 chromosomes in its karyotype, how many chromosomes are in its gametes?
26
How many cells result from meiosis I?
2
Are the cells resulting from meiosis identical or unidentical?
unidentical
How many cells result from meiosis II?
4
What phase do chromatids separate in meiosis?
anphase II
A human cell that has 22 autosomes and a Y chromosome is what kinda cells?
sperm cell
A human cell that has 22 autosomes and a X chromosome is what kinda cells?
egg cell
When do homologous chromosomes separate?
anaphase I of meiosis I
