Reproduction

Question 1

Define sexual determination.

Answer 1

Genetically control dependent on the switch ( y chromosome) to determine whether a foetus will be male or female.

Question 2

Define sexual differentiation.

Answer 2

The process of developing internal and external genitaliaas a male or female.

Question 3

What are the 5 steps of sexual differentiation?

Answer 3

Genotypic sex

Gonadal sex

phenotypic sex

legal sex

gender identity

Question 4

What determining region of the Y chromosome codes for Y expression?

Answer 4

The SRY - sex deterining region.

Question 5

SRY gene activation causes…

Answer 5

the activation of the gonadal development to for testis or ovaries.

Question 6

What 2 important hormones are developed by the testis cells?

Answer 6

Anti-Mullerian hormone AMH

Testosterone

Question 7

Describe the process of gonadal development

Answer 7

1. Fertilisation - bipotential gonads
   
   1. Genital ridge primordia - precursor at 3-4 weeks
      
      1. Primordial germ cells
      2. Primitive sex cords
      3. Mesonephric cells

Question 8

The primordial germ cells determine…

Answer 8

Sperm or OOcytes

Question 9

The primitive sex cords determine…

Answer 9

Sertoli cells

Granulosa cells

Question 10

The Mesonephric cells determine…

Answer 10

Leydig cells or Theca cells.