The Phases
The cytoplasm is divided and two new cells are formed.
Cytokinesis
New chromosomes reach opposite ends of the cell and uncoil
telophase
forms sperm and eggs
meiosis
The union of two haploid gametes forms a diploid cell called a ________.
Zygote
The chromosomes are lined up at the center of the cell
metaphase
The joining of two gametes is called what?
fertilization
reduces the 2n number of genes down to n
meiosis
What is the difference between the haploid and diploid cell?
Haploid = having one set of genes
Diploid = organism has two complete sets of all the genes the organism needs
The nuclear membrane disappears and the chomatine begins to coil up
prophase
The copying of DNA into two identical DNA molecules
Replication
creating of new skin cells
mitosis
Sister chromatids divide into separate chromosomes
anaphase
Reproduction that does not involve gametes and results in offspring that are identical to the parent is called what?
asexual reproduction
Results in offspring that are identical to the parent
mitosis
A cell copies its DNA toward the end of this normal growth phase
interphase
The sperm and the egg cells for mice each have 20 chromosomes. How many chromosomes to the diploid zygotes formed by the sperm and egg cells have?
40 (remember 2n)