Chapter 6 Biology
An actively dividing cell has six chromosomes. How many sister chromatids are present within this cell at the end of G2 phase
12
A duplicated chromosome consists of how many sister chromatids
2
If a plant has a total of 18 chromosomes, how many chromosomes would be present in each of its gametes
9
Which phase of the cell cycle does the cell increase in size in preparation for division
G Phase
Which of the following statements about cell division is correct
It is the process by which organisms grow and maintain their issues
Which of the following differentiates meiosis from mitosis
Mitosis is used fro the repair of cells, whereas meiosis creates cells for sexual reporduction
Which of the following accurately describes crossing over
Paternal chromosome 7 exchanges segments of DNA with maternal chromosome 7
Which phase of the cell cycle is the genetic material duplicated
S phase
What are the stages of interphase
S, G1, and G2
What is the significance of crossing over
The resulting gametes will have different gene combination than their parent cells' gene combinations
Which of the following best exemplifies homologous chromosomes
a tetrad
Which of the following accurately describes the similarities between mitosis, meiosis, and binary fission
all three of the processes are used to produce daughter cells
The G0 phase of the cell cycle is distinguished by
an absence of preparation for DNA synthesis
Which of the following foods is most likely to contain haploid cells
an egg
Cells that demonstrate anchorage independence
are primed to become metastatic
A researcher is recording the process of bacteria cell division using time-lapse microscopy. Which of the following processes would she be observing
binary fission
What does not contribute to genetic uniqueness
binary fission
The process of mitosis is thought to have evolved from binary fission. What similarities exist between these processes
both processes include DNA segregation
Which of the following is a difference between binary fission and mitosis
breakdown of the nuclear envelope
Which of the following pairs of processes encompasses the entire cell cycle
cell division and interphase
The circle near the center of this structure represents a
centromere
Homologous chromosomes
consist of a maternal and paternal copy of each chromosome
Some daughter cells are described as clones, For this description to be appropriate, the daughter cells must
contain a set of DNA that is identical to that of the parent cell
In genetic engineering, molecular biologists often combine segments of DNA from two separate organisms. This is an example of genetic recombination that occurs in a laboratory setting. Which of the following is a form of genetic recombination that occurs naturally within cells
crossing over
During which phase of the cell cycle is the genetic material evenly partitioned between daughter cells
cytokinese
A scientist wishing to generate cancerous cells in vitro could subject the cells to which of the following procedures
expose cells to chemicals that disrupt mitosis
Which two processes work in conjunction to create genetic diversity and maintain chromosome number
fertilization and meiosis
Which of the following is NOT a factor that influences a cell's progression through the cell cycle
gametes
Cancers are groups of cells that divide rapidly and uncontrollably. Thus, cancer cells
have a relatively short G1 phase
The possible combinations of alleles in gametes BLANK due to independent assortment and crossing over
increases
A pool of cells is treated with a chemical that halts progress that halts through the cell cycle. In which stages of the cell cycle would most cells be found
interphase
Which of the following is associated with mitosis
maintenance of chromosome number
Model organisms (like mice) used in the study of genetic disease
may accurately reflect how disease like cancer occur in humans
Gametes are produced by meiosis rather than mitosis because
meiosis reduces the chromosome number so that zygotes produced will have one full genome
Chromosomes are lined up at the middle of the cell during what portion of cell division
metaphase
The goal of meiosis is to
produce eggs and sperm
Which of the following choices states a correct reason why the process of cell division is different for prokaryotic than for eukaryotic cells
prokaryotes have a circular DNA molecule
Which of the following is known to result from the disruption of mitosis and meiosis
prostate cancer
When appropriately prompted, diploid individuals of Ulva Prolifera form spores that germinate to become haploid individuals. How might diploid individuals be created to complete the life cycle
some individuals differentiate to become haploid gametes and then fuse to produce a diploid zygote
Which of the following cell types is produced by meiosis
sperm cells
When examining the rapidly dividing cells of a fish embryo, you notice a cell that seems to contain two nuclei. The middle of the cell is pinched inward. This cell must be in what stage of mitosis
telophase
Which of the following would promote a cell to move through the G2 checkpoint
the genetic information has been duplicated
Which of the following is true of the chromosomes in a homologous pair
they carry the same genes
The process shown in the figure could produce
two identical prokaryotic cells
The successful union of one make and one female gamete forms a new single cell known as a what
zygote