7 Flashcards
Aromatase
An enzyme responsible for converting
androgens into estrogens, aids in gonadal differentiation and temperature-dependent sex determination in reptiles.
Haploid-Diploid Sex Determination
a system used to determine sex based off of chromosme sets where haploid males develop from unfertilized eggs & diploid females from fertilized egg
Dosage Compensation
A genetic mechanism that ensures that X-linked genes are equally expressed in male and females through X-chromosome inactivation or adjustements of the gene expression
TDF (Testis Determining Facto
A TF encoded by the SRY gene on the Y chromosome, initiating male gonadal development during embryogenesis.
Pseudohermaphrodite
–when the sex of an organism does not match its phenotypic sex due to mutations that affect sexual differentiation pathways
Transformer (tra) Gene in Drosophila
A gene involved in sex determination via alternative splicing, which will produce female specific-triats if functional and sterile male phenotypes if mutated
X:A Ratio in Sex Determination
The ratio of X chromosomes to autosomes that determines sex in organisms like Drosophila, with a ratio of 1 leading to females and 0.5 to males.
Barr Body
A condensed and inactivated X chromosome observed in female cells, used as an indicator of the number of X chromosomes present.
DMRT1
A gene involved in sex differentiation and associated with male development, it’s mutations could potentially lead to sex reversal.
Gynandromorph
An organism exhibiting both male and female characteristics due to chromosomal mosaicism, often arising from the loss of a sex chromosome during early development.