Cell Cycle Flashcards
(11 cards)
DNA can either be in chromatin or chromosome form and can either be unreplicated or replicated. Pair the phase of the cell cycle with the form of DNA.
Phases: Metaphase of mitosis, Anaphase of mitosis, G1 of interphase, G2 of interphase
Forms: Unreplicated chromatin, Replicated chromatin, Replicated chromosome, Unreplicated chromosome
Metaphase of mitosis –> Replicated chromosome
Replicated chromosome –>
Q: During which stage of meiosis does crossing over usually occur?
a) prophase 1
b) metaphase 1
c) prophase 2
d) metaphase 2
a) prophase 1
Q: Where do different chromatids of the same homologous pair cross over?
a) Centromere
b) Chiasmata
c) Kinetochore
d) Telomere
b) Chiasmata
Q: The members of an autosome chromosome pair, called __________, look alike and carry __________ for the same traits at the same location on each pair.
a) non-sister chromatids; homologous pairs
b) sister chromatids; genes
c) homologous pairs; genes
d) genes; homologous pairs
c) homologous pairs; genes
Q: What is the effect of crossing-over on the daughter chromosomes, those chromosomes that result once sister chromatids are separated by the first division of meiosis?
a) Genetically different, or recombinant, daughter chromosomes result
b) Crossing-over deletes some alleles and duplicates others so the daughter chromosomes contain the new mutations.
c) Crossing-over does not have any detectable effect on the daughter chromosomes.
d) Genetically identical daughter chromosomes result.
a) Genetically different, or recombinant, daughter chromosomes result
Q: What happens during the first half of meiosis? During __________ of homologues pair during synapsis, during ___________ homologues randomly align at the equator, and during __________ homologues separate.
a) prophase I, anaphase I, telophase I
b) prophase I, metaphase I, anaphase I
c) anaphase I, metaphase I, telophase I
d) anaphase I, metaphase I, interkinesis
b) prophase I, metaphase I, anaphase
When during meiosis does independent assortment occur?
Metaphase 1
The law of independent assortment states that:
The chromosomes of one type sort into the gametes independently of the chromosomes of another type
How many possible combinations of chromosomes are there in the gametes of a n=6 cell?
64
How many possible combinations of chromosomes are there in the gametes of a 2n=6 cell?
8
Random orientation of homologous chromosomes occurs in ________ of meiosis.
metaphase 1
