cell cycle Flashcards
Which typical stage is known for DNA replication?
A. S phase
B. G1 phase
C. G2 phase
D. Metaphase
A.
Number of chromatids at metaphase is
A. two each in mitosis and meiosis
C. two in mitosis and one in meiosis
B. two in mitosis and four in meiosis
D. one in mitosis and two in meiosis
A.
Synapsis occurs between
A. mRNA and ribosomes
B. Spindle fibers and centromere
C. a male and a female gamete
D. two homologous chromosomes
D.
Continuous variations are attributed to
A. polyploidy
B. mutation
C. Crossing over
D. chromosomal aberrations
C.
The cell grows and replicates its DNA and centrioles
Interphase
The cytoplasm pinches in half. Each daughter cell has an identical set of duplicate chromosomes.
Cytokinesis
The chromosomes gather at opposite ends of the cell and lose their distinct shapes. Two new nuclear envelopes
will form.
Telophase
The sister chromatids separate into individual chromosomes
and are moved apart
Anaphase
The chromosomes line up across the center of the cell. each
chromosomes is connected to a spindle fiber at its
centromere.
Metaphase
The chromatin comdences into chromosomes. The centrioles
separate, and a spindle begins to form. The nuclear envelope breaks down.
Prophase
Cell growth
G1
DNA Replication
Synthesis
Preparation for mitosis
G2
Cell division
Mitosis
