Reproduction Flashcards
Centromere:
What binds together the chromatids
Autosomal chromosomes:
Chromosomes numbered 1-22
Cytokinesis:
When the daughter cells are produced
Diploid:
A cell with 23 chromosome pairs.
Abbreviation for diploid
2n
Abbreviation for haploid
N
Gamete
Sex cell/ germ cell
Sperm/egg
Germ cell:
Sex cell
Haploid:
Cell with only 23 chromosomes
Meiosis
Reproduction of sex cells
Mitosis:
Reproduction of body cells
Somatic cells
Cells produced by mitosis with a complete number of chromosomes.
Tetrad
When the four chromosomes stay very close together.
Crossing over
When the homologous chromosomes exchange one or more of their genes with eachother.
Zygote
The cell formed when two sex cells (sperm and egg) unite.
Order of mitosis stages
Interphase, prophase, metaphase, anaphase, telophase
Spermatogenesis produces
4 sperms
Oogenesis produces
One single egg
Germ cell=
Spermatogonium or oogonium
Spermatogonium and oogonium are found
In the body
The polar bodies produced in oogenesis don’t
Enter the ovaries
Start with germ cell and end with
Sperm or egg
Purpose of mitosis in multicellular organisms
GRR Grow Replace Repair (Asexual Reproduction)
Purpose of meiosis in multicellular organisms:
Gamete production (sex cell production) For sexual reproduction