biology test i hope i dont fail
three cells undergo meiosis. How many haploid cells are produced?
12
how many chromosomes does a child inherit from his or her parents?
23 from the mother and 23 from the father
if an organism's diploid number is 12, what would be its haploid number?
6
why is meiosis important for organisms?
It allows for genetic variation among organisms.
which best describes meiosis?
It produces male and female sex cells.
which statement best describes the overall change that occurs as a result of mitosis?
One cell becomes two cells that have identical copies of DNA.
which is the main reason cells are replaced in the body?
The cells are damaged.
which best describes red blood cells?
They transport oxygen throughout the body.
which discovery did Gregor Mendel make?
Traits are inherited independently of each other.
which best defines a diploid cell during meiosis?
a cell that has double the number of chromosomes as the daughter cell
which definition correctly describes a haploid cell during meiosis?
a cell that has one complete set of chromosomes
imagine that a disorder that causes the cell cycle to stop affects the muscle cells of a frog's leg. What consequence is most likely to follow?
an injury to the muscle will not heal.
centromeres split apart during
anaphase
the number of chromosomes in each cell goes from diploid to haploid after
anaphase II
It is crucial that the process of mitosis is error free. This is because otherwise healthy cells can
become cancer cells.
which can disrupt the cell cycle?
cancer
which are replicated during interphase?
chromosomes
in his study of pea plants, Gregor Mendel used which method to produce offspring?
cross-pollination, by using parents that had different traits
which three processes are methods of genetic recombination?
crossing over, independent assortment, and fertilization
which part of cell division is different in plant and animal cells?
cytokinesis
which statement accurately describes the relationship between cytokinesis and mitosis?
cytokinesis follows mitosis.
mitosis produces which cell type?
diploid
an example of mitosis at work is a plant root
elongating
what is the end result of meiosis?
four different daughter cells
which are produced as a result of meiosis?
gametes
which consist of sperm cells and egg cells?
gametes
which include the male and female sex cells?
gametes
how does interphase prepare cells for mitosis?
growth of cell and replication of DNA
meiosis produces which cell type?
haploid
the equations summarize the process of fertilization. Which equation represents fertilization?
haploid + haploid = diploid
which is required for sexual reproduction?
meiosis
which process must the cell undergo to have identical cells at the end of cell division?
mitosis
mitosis is important because it allows
new cells to replace old damaged cells.
scientists use tissue cultures to study possible medicines that can be used to treat cancer patients. What is one benefit of this procedure?
patients do not receive harmful or ineffective medication.
in which phase of mitosis are chromosomes first seen as a result of chromatin coiling?
prophase
during which phase of meiosis does the crossing over of chromosomes occur?
prophase I
early in mitosis, the nucleus, nucleolus, and nuclear envelope begin to dissolve in preparation for cell division. In which stage of the cell cycle is this process reversed?
telophase
which is a homologous chromosome pair?
tetrad
chemicals used in chemotherapy treatments to fight cancer can also harm cells in hair follicles and bone marrow. What characteristic do these cells most likely share with cancerous cells?
they divide rapidly
tissue cultures (samples of cancer cells) are taken from cancer patients, and the cells are then grown in a laboratory. What is the purpose of growing cancer cells in a laboratory?
to test medicinal treatments before giving them to patients
which is the end result of cytokinesis?
two cells that have two identical copies of DNA