1 - Repro - Origin of the Sexes Flashcards
From which layer of the bilaminar disc does do the primordial germ cells develop from?
Epiblast
What determines whether the primordial gonads develop into ovaries or testes?
Whether they are colonised by a germ cell with XX or XY chromosomes
What part of the primordial gonad does a germ cell with XX chromosomes colonise?
Cortex
What part of the primordial gonad does a germ cell with XY chromosomes colonise?
Medulla
Name the gene expressed by Sertoli cells, which drives male development:
SRY gene
Which cell expresses the SRY gene which drives Male development?
Sertoli cells
What is the average length of the vas deferens?
~ 30-45 cm
Which part of the male genitalia develops from the urogenital sinus?
Prostate
Bulbourethral glands
Urethra
Which part of the male genitalia develops from the mesonephric duct?
Epidydimis
Vas deferens
Seminal vesicles
Which part of the female genitalia develops from the urogenital sinus?
Vagina
Which part of the female genitalia develops from the paramesonephric ducts?
Fallopian tubes
Uterus
Cervix
List some secondary female sex characteristics:
- Hair growth
- Breast development
- Subcutaneous fat redistribution (around hips, buttocks and thighs)
- Elbows hyperextend 5-8’ more than males
List some male secondary sex characteristics:
- Hair growth
- Change in body composition: more muscle:fat
- Enlargement of larynx = voice deepens
- Larger hands, feet and nose
- Broadening of shoulders and chest
What is another name for the Wolffian ducts?
Mesonephric ducts
What is another name for the Mullerian ducts?
Paramesonephric ducts