Checkpoints
This cell division checkpoint makes sure DNA synthesis occurred correctly.
What is the G2 checkpoint?
A haploid cell has 22 chromosomes. The diploid form of this organism has this many number.
What is 44 chromosomes?
Asexual reproduction is associated with this process of cellular division.
What is mitosis?
DNA condenses during this phase of the cell cycle.
What is prophase?
Sister chromatids separate during this phase of meiosis.
What is anaphase II?
The M phase checkpoint ensures that all chromosomes are attached to the mitotic spindle. If this does not happen, cells would most likely be arrested in this phase of mitosis.
What is metaphase?
Dogs have 78 chromosomes in the nuclei of their cells. You can expect to find this number of chromosomes in the nucleus of a dog ovum.
What is 39 chromosomes?
Soon after fertilization, the number of cells rapidly increases during this stage of development.
What is cleavage?
The nucleus reappears during this phase of the cell cycle?
What is telophase?
Homologous chromosomes exchange genetic material during this phase of meiosis.
What is prophase I?
S phase is associated with this cellular event.
What is DNA replication/synthesis?
You are a conservation biologist at the San Diego Zoo. Your job is to examine and cryopreserve field collected samples of salmon sperm for a future breeding program. While observing an electron microscope image of a sperm sample, you count 24 chromosomes in the nucleus. You can expect to find this number of chromosomes in the nuclei of salmon epithelial cells.
What is 48 chromosomes?
Cells begin expressing different genes during this stage of development.
What is gastrulation?
Name of the structure that attaches microtubules to chromosomes.
What is a kinetochore?
Ducks have 80 chromosomes in their somatic cells. After meiosis I, the duck cells have this number of chromosomes.
What is 40 chromosomes?
Cancer occurs when cells reproduce uncontrollably causing tumors and interfering with physiological processes. This checkpoint likely fails in cancer cells.
What is G1 check point?
Hybridization between closely related species is possible. A diploid organism possessing 22 chromosomes mates with a diploid organism that possesses 26 chromosomes. The offspring will possess this number of chromosomes.
What is 24 chromosomes?
This structure prevents multiple sperm from fertilizing an egg.
These stages of the cell cycle are skipped during cleavage.
What are the G1/G2 phases?
Ducks have 80 chromosomes in their cells. After meiosis I, the duck cells have this number of sister chromatids.
What is 80 sister chromatids?
Down syndrome is a condition that results from inheriting an extra chromosome 21. A failure in this cellular checkpoint during meiosis could result in a person inheriting an extra chromosome.
What is M checkpoint?
Starting with a fertilized egg (zygote), a series of seven cell divisions would produce an early embryo with this number of cells.
What is 128?
The liver develops from this germ layer.
What is the endoderm?
The number of sister chromatids in human cells during G2.
What is 96 sister chromatids?
The stages of the cell cycle skipped between meiosis I and meiosis II.
What are the G1, S, and G2 phases?