Class Notes (1,100,000)
CA (630,000)
UW (20,000)
BIOL (2,000)
BIOL239 (300)
Lecture

Set 7: Chromosomes Part II Euploidy, Monoploidy, Triploidy, Tetraploidy


Department
Biology
Course Code
BIOL239
Professor
Christine Dupont

This preview shows half of the first page. to view the full 2 pages of the document.
Euploidy
Jan 31, 2011
Euploids: gain or lose entire sets of chromosomes
Ie. Humans are euploid species because we’re diploid
Polyploids: euploids that carry three or more complete sets of
chromosomes
Eg triploids, tetraploids
Monoploids: one complete set of chromosomes (usually
infertile because can’t go through meiosis
To make a monoploid does not involve fertilization. Females go
through parthenogenesis: embryo develops from unfertilized
gamete
Eg. Sterile male worker bees
Triplods are the result of mating diploids with tetraploids
Triploid plants are viable but sterile (ie. No seeds)
- not fertile because during meiosis, you end up with
gametes that are random variations of aneuploidy
Creation and Use of Monoploid Plants:
convert from diploid to monoploid then back again
- If diploid is carrying a useful recessive allele, one can
create a monoploid and see the desired phenotype
immediately
- Treat pollen of diploid to cold shock give nutrients and
growth hormones, it will develop into monoploid plant
- clone plants by putting cells of monoploid in nutrients
You're Reading a Preview

Unlock to view full version