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Cellular Biology > Gametogenesis > Flashcards

Gametogenesis Flashcards

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1
Q

Genetic (chromosomal) sex

A

Determined at fertilization

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2
Q

Gonadal sex

A

Testis determining genes (SRY and SOX9)

Also ovary determining genes

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3
Q

Phenotypic (somatic) sex (2)

A

Tubular and external structures

Antimullerian hormone, testosterone, dihydrotestosterone

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4
Q

Gonads are initially distinguished when in large animals

A

6 weeks

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5
Q

Where is the TDF synthesized

A

In sex cord of male

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6
Q

What is TDF

A

Testis determining factor

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7
Q

Spermatogenesis

A

Process of sperm production

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8
Q

Phases of spermatogenesis (2)

A

Spermatocytogenesis

Spermiogenesis

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9
Q

Spermatocytogenesis (2)

A

Process of producing haploid cells by meiosis

Resulting cells or spermatids are usually round

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10
Q

Spermiogenesis

A

Process by which spermatids mature into spermatozoa

Morphological process without any further cell division

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11
Q

Steps of spermatocytogenesis (products)

A

Spermatogonia
1ry spermatocyte
2ry spermatocyte
Sperm

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12
Q

Spermatogonia (2)

A

Multiply by mitosis

Differentiate into 2 1ry spermatocyte

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13
Q

1ry spermatocyte (2)

A

Enter meiosis

Produces 2 2ry spermatocytes

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14
Q

2ry spermatocyte (2)

A

Enters meiosis 2

Produces 2 spermatid (4) which makes sperm

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15
Q

Blood testis barrier (3)

A

Maintains unique environment for development and maturation of germ cells
Protects germ cells from noxious agents
Prevents autoimmune response to sperm

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16
Q

Structure of blood testis barrier (3)

A

Specialized capillary epithelium
Basement membrane
Specialized junctions between neighboring sertoli cells

17
Q

Cytoplasmic maturation depends on

A

Depends on close association between oocyte and corona radiata cells

18
Q

Cytoplasmic projections occur through

A

Zona pellucida

19
Q

Follicle oocyte interaction function

A

One important function is to delay resumption of meiosis until appropriate time

20
Q

Follicle oocyte interaction

A

Close physical relationship between oocyte and corona radiata cell

Cellular Biology (13 decks)

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