During interphase of the cell cycle, ________.
A) DNA recombines
B) sister chromatids move to opposite poles
C) the nuclear membrane disappears
D) RNA replicates
E) DNA content essentially doubles
If a typical somatic cell has 64 chromosomes, how many chromosomes
are expected in each gamete of that organism?
In an organism with 52 chromosomes, how many bivalents would be
expected to form during meiosis?
For the purposes of this question, assume that a G1 somatic cell
nucleus in a female Myrmecia pilosula contains 2 picograms of DNA. How
much DNA would be expected in a metaphase I cell of a female?
A) 16 picograms
B) 32 picograms
C) 8 picograms
D) 4 picograms
E) Not enough information is provided to answer the question
An interesting group of ants consists of several virtually identical,
closely related species, with females having chromosome numbers of 18,
20, 32, 48, 60, 62, and 64. If one crossed a female of species (A)
with 32 chromosomes and a male species (B) with 9 chromosomes (males
are haploid, and each gamete contains the n complement), how many
chromosomes would one expect in the body (somatic) cells of the female
What is the outcome of synapsis, a significant event in
A) side-by-side alignment of nonhomologous chromosomes
B) dyad formation
C) monad movement to opposite poles
D) side-by-side alignment of homologous chromosomes
E) chiasma segregation
In a healthy male, how many sperm cells would be expected to form
from (a) 400 primary spermatocytes? (b) 400 secondary spermatocytes?
A) (a) 800; (b) 800
B) (a) 1600; (b) 1600
C) (a) 1600; (b) 800
D) (a) 400; (b) 400
E) (a) 100; (b) 800
In a healthy female, how many secondary oocytes would be expected to
form from 100 primary oocytes? How many first polar bodies would be
expected from 100 primary oocytes?
A) 200; 50
B) 100; 50
C) 200; 300
D) 100; 100
E) 50; 50
If a typical G1 nucleus is 2n and contains 2C (two complements) of DNA, a prophase I cell is 2n and contains 4C of DNA
S phase is the part of interphase when DNA duplication takes place.
The centromere of a chromosome separates during anaphase.
A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle
If a typical G1 nucleus contains 2C (two complements) of DNA, a gamete that is haploid (n) contains 1C of DNA
During meiosis, chromosome number reduction takes place in anaphase II.
A bivalent at pachytene contains four chromatids
The meiotic cell cycle involves two cell divisions but only one DNA replication.
An organism with a haploid number of 10 will produce 1024 combinations of chromosomes at the end of meiosis.
An organism with a diploid chromosome number of 46 will produce 223 combinations of chromosomes at the end of meiosis