stages Flashcards
is meiosis 1 or 2 more similar to mitosis/
Meiosis to is more similar to mitosis because of the separation of sister chromatids which is the primary event in mitosis meiosis 1 involves the separation of homologous chromosomes which is not in mitosis
what are chromosomes made of
dna and protiens called histones
what produces spindle fibers
centriole
Chromosomes condense nuclear membrane breaks down spindle fibers begin to form from centrioles
1st stage prophase
2nd stage metaphase
chromosomes line up in the middle of the cell (equator)spindle fibers attached to the centromeres
anaphase 3rd stage of mitosis
Spindle fibers pull sister chromatids apart sister chromatin are moving to the opposite sides centromere divides
nuclear membrane reforms spindle fibers break down chromosomes begin to uncondence or become invisible reverse of prophase
telophase 4th stage of mitosis
cytokinesis
Cytoplasm divides to produce two identical daughter cells final division of cytoplasm and organelles two new genetically identical cells looks just like interphase
longest phase of cell cycle
interphase-normal cell life in between divisions
In which phase is their chromatin and not chromosomes
interphase and cytokinesis
when do chromosomes divide
anaphase
what is a gamete
sex cell made by meisos sperm cells and egg cells
is a sperm cell and an egg cell a gamete or a body cell
gamete
A dog has 78 chromosomes in its brain cell. How many different types of chromosomes are found in a dog’s brain cell?
39
A rice plant has a total of 24 chromosomes in its somatic cell. How many total chromosomes can be found in a rice plant’s gamete?
12
what is a zygote
diploid cell
A human has 46 chromosomes in their body cells. What is the haploid number?
23
the difference between mitosis and meiosis
Mitosis produces HUMAN cells with 46 total chromosomes (2 of each kind).
Meiosis produces HUMAN cells with 23 total chromosomes (1 of each kind)
when does a new nucleus form at eacj end
telophase
