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15 Cards in this Set

  • Front
  • Back
what is the middle of the choromosme called?
the centromere
what are the two types of choromosomes?
sex chromosomes and autosomes
what are females chromosomes and what are male choromosomes?
female- xx
male- xy
how many chromosomes do humans have?
46, 2- sex 44- autosomes (22 pairs)
all cells are derived from---
the division of preexisting cells
what are the 2 kinds of cell division in eukaryotic cells?
1. mitosis
2. meiosis
what are the steps of interphase?
G1 phase- cell growth
S phase- DNA is copied
G2 phase- growth & prep. for cell divison
what are the two stages of cell division?
m phase- the nucleus divides
cytokenesis- the cytoplasm divides
what are mitotic spindle made up of?
kinetochore fibers and polar fibers
what are the 4 stages of mitosis and meiosis?
prophase, metaphase, anaphase, telophase
what does meiosis form?
SPERM cells
how doess each spermatid mature into a sperm cell?
through spermatogenesis
what is oogenesis?
the production of mature egg cells
what is asexual reproduction?
the production of off-spring from only one parent and does not invovle the union of gametes
what is sexual reproductino?
the proudction of off-spring through meiosis and the union of gametes