Misc. Genetics
The average number of chromosome pairs in a human.
23
Like chromosomes (xx/zz) and unlike chromosomes (xy/ZW)
Homogametic & Heterogametic
The chromosome theorized to have similar traits and effects as the Y chromosome, but in a different species
W Chromosome
This is the default reproductive tract
Twin cattle of opposite sexes that share a blood supply.
Free Martin
The central Dogma of Genetics
DNA - transcribes into - RNA - translates - Protein
The process of reptile sexual development within the egg.
Temperature-Dependant
There is at least this many genes on the Y Chromosome.
75 genes
twins resulting from a single egg being fertilized
Monozygotic
The syndrome characterized with larger and longer limbs, rudimentary male genitalia, and some feminine development.
Klinefelter Syndrome
These two organelles have their own DNA
Mitochondria and Chloroplasts
Individuals with 2 genetic cell lines in their somatic cells.
Mosaics
This is the region at both ends of the Y chromosome that shares homology with regions of the X Chromosome.
PARs : Pseudoautosomal region
This is when sexual differentation begins occuring.
The Syndrome characterized by short/underdeveloped bodies, rudimentary female genitalia, and possible cognitive impairment.
Turner Syndrome
These are the stages of mitosis.
Prophase, Prometaphase, Metaphase, Anaphase, Telophase
Define the Lyon Hypothesis
In-activation in one X chromosome to help balance the genes in both sexes. Ex: Calico Cats
The region on the Y chromosome that encodes for the protein: Testis-Determining Factor.
SRY - Sex-determining Region
These three layers make up the Blastocyst.
Ectoderm, Mesoderm & Endoderm
The failure for chromosomes to segregate during meiosis.
Non-disjunction.
The offspring of two parents: Homozygous brown rabbit (bb) heterozygous Black rabbit (Bb).
Most popular theory for sexual dimorphism in chickens.
Bonus 50 for both theories.
DMRT1 on Z chromosomes, decreased amount on ZW causes "feminizing" effect
Ovary-determining gene on W chromosome.
This is triggered by TDF (testis-determining factor)
SOX-9 gene
Primordial germ develop in yolk sac, then migrate to ........ which eventually forms .......
Gonadal ridge / gonads
This explains the reason X-inactivation does not affect turner or kleinfelter syndrome.
About 15% the chromosomes that form a barr body escape inactivation.