GEN BIO Flashcards
Model organism for study of mitosis
Zebra Fish (Danio Rerio)
What are somatic cells
Body cells
meiosis is for what cells
sex cells
mitosis is for what cells
body cells
what is the division of cytoplasm
Cytokinesis
True or False. Prokaryotes can undergo Meiosis
False
2 Types of Nuclear Division
Meiosis and Mitosis
Haploid Nuclear Division
Meiosis
Diploid Nuclear Division
Mitosis
how many chromatids does a sister chromatid has
2
what is in the middle of a chromosome
centrosome
complex that holds together
cohesins
Where do cohesion takes place?
centromere
it is the counting of the number of chromosomes
Ploidy
there are more than 2 chromosomes
Polyploids
It has 2 chromosomes
Diploid
what type of chromosome and sex if the dominant parent is the father
X chromosome
what type of chromosome and sex if the dominant parent is the mother
Y chromosome
The 3 parts of the cell cycle
- Cell growth and replication of DNA
- Nuclear division (Mitosis)
- Division of the Cytoplasm (cytokinesis)
2 Types of Nuclear Division
Mitosis and Meiosis
In a cell, each chromosome is composed of how many DNA molecule?
One
Sister chromatids are held by
Sister Chromatid cohesion
It is the equal distribution of chromosomes into each daughter cell
Chromosome segregation
it is the number of chromosome sets in a species
Ploidy
it is the phase where the cell grows
G1 phase
it is the phase where DNA replicates
S phase
it is the phase where the prepares for mitosis
G2 Phase
5 stages of mitosis
- Prophase
- Prometaphase
- Metaphase
- Anaphase
- Telophase
it is the phase where the nucleolus disappears and the mitotic spindle begins to form
Prophase
it is the phase where the nuclear envelope breaks down
Prometaphase
it forms in each sister chromatid at the centromere
kinetochore
it binds to the kinetochores
Kinetochore microtubules
it overlap those from the opposite spindle pole
Nonkinetochore microtubules
it is the mitotic phase in which spindle microtubules move the chromosomes into alignment at the spindle midpoint
Metaphase
it is the spindle midpoint
Metaphase plate/Equatorial plane
it is the mitotic phase where the spindle separates sister chromatids and pulls them toward opposite spindle poles
Anaphase
it is the mitotic phase where the spindle disassembles and the nucleolus reappears and a new nuclear envelope forms where the cell has 2 nuclei
Telophase
it is the mitotic phase in which it produces two daughter cells
Cytokinesis
3 key checkpoints of the cell cycle
1.G1/s
2. G2/M
3. Mitotic spindle checkpoint
it is the signals to dtop
checkpoints
it is the checkpoint where it checks the DNA
G1/s Checkpoint
it is the checkpoint to ensure that the copying of DNA is correct
G2/M
it is the checkpoint to check if the chromosomes are properly attached
Mitotic spindle checkpoint
it triggers different phases
Cyclins
cyclin for G1 phase
cyclin for s phase
cyclin for G2 phase
cyclin for mitosis
1.Cyclin D
2. Cyclin E
3. Cyclin A
4. Cyclin B
it is caused by continuous uncontrolled cell division
Cancer
it is a growing mass
Tumor
it is the spreading of cancer cells
Metastasis
it is the mutated form of the genes
Oncogenes
female gametes
Egg cell
male gametes
Sperm Cells
at fertilization, the nuclei of an egg and sperm cell fuse, producing a
Zygote
it is the primary sex organs
Gonads
Male gonads
testes
Female Gonads
Ovaries
it is the creation of gametes
Gametogenesis
True or False. Meiosis divides 3 times
False, 2 Times
it is the exchange of DNA in Meiosis
Crossing-over
it is the version of a gene
Alleles
it is 4 sisters chromatids
Tetrad
it is the phase where crossing-over happens
Prophase I
it is the forming of tetrads
Synapsis
it is the sites where crossing-over occured
Chiasmata
True or False. In Anaphase I the sister chromatids would separate and move to the opposite poles
False. Anaphase II
True or False. In meiosis II the cells are still intact after Telophase I
False. The chromosome counting would be per cell
How many cells would be produced after Telophase II and Cytokinesis ?
4
True or False. Syanapsis occurs in Meiosis
True
True or False. There are only 1 cell division for Mitosis and 2 cell division for Meiosis
True
True or False. Crossing-over occurs in Mitosis
False
True or False. the number of daughter cells in Meiosis is 2 and 4 daughter cells for Mitosis
False. 2 for Mitosis and 4 for Meiosis
it is the reason for genetic diversity
Meiosis
what are the 3 sources of variability of Meiosis
- Crossing-over
- Independent assortment
- particular sets of male and female gametes that united in fertilization
the processes of formation of male and female gametes
Oogenesis for Female
Spermatogenesis for Male
how many eggs can a female ovulate per month
1
how many eggs are good for female to achieve sustainability
1