exercise 7 anatomy and physiology
a karyotype is used to count centrioles and spindle fibers
false
What is the main purpose of mitosis?
for cellular division to enable growth and repair of cells
What is the main reason for interphase?
for the metabolic processes that occur in the nucleus and cytoplasm
In animal cells, the indentation were the cells are pinching apart during telophase is called the
nuclear envelope
telophase
nuclear envelopes begin to reassemble around two daughter nuclei, chromosomes decondense, spindle fiber disappears, contractile ring tightens to form the cleavage furrow as the cytoplasm divides into two cells
Which is the correct sequence of the mitotic stage?
prophase, metaphase, anaphase, telophase
daughter cells are formed from cell cycles
true
anaphase
Spindle fibers pull sister chromatids to opposite poles of cell, each pole has an identical set of genes
sister chromatids separate to opposite poles during
anaphase
A cell in stage G-zero
ceases cell division
metaphase
chromosomes align along metaphase plate of cell, some spindle fibers attach, to kinetochores, fibers of aster extend from centrosome to plasma membrane
which of the following occurs in prophase?
chromosomes condense
what happens prophase?
chromosomes condense and become visible, nuclear envelope and nucleolus disperse, single apparatus forms, centrioles migrate to opposite poles of cells
Which of the following is not a part of interphase?
cytokinesis
the cell cycle
(G1, S, G2)- interphase, (mitosis, cytokinesis) - mitotic phase
what happens in the G1 phase?
(first gap phase) cell will grow and synthesize materials needed for the S phase
What happens in the G2 phase
(second gap phase) cell completes growth and production of enzymes
what happens in the S phase?
(synthesis phase) replicates its DNA and centrioles
a human diploid cell has how many chromosomes
46
What is meiosis?
A special type of cell division that occurs in the reproductive system to produce haploid gametes with 23 chromosomes
cytokinesis
divides parent cell into two daughter cells
Which of the following events occur in telophase?
sister chromatids separate
What is a karyotype?
the arrangement go homologous chromosome pairs together in a chart it can aide the diagnosis of genetic conditions