5.10 Sex Determination Flashcards Preview

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Flashcards in 5.10 Sex Determination Deck (23):
0

Genetic Sex is determined with the presence or absence of which chromosome

Y

1

Gonadal sex is controlled by the presence or absence of

TDF testis determining factor (which is contained in the SRY region of Y chromosome)

2

Precursor of female internal sec organs

Mullerian system

3

Precursor of male internal sex organs

Wolffian system

4

External genitalia is determined by presence or absence of

Testosterone
(-) testosterone - female genitalia develops
(+) testosterone - male genitalia develops

5

Urogenital folds differentiates to become
A. Labia majora
B. Labia minora

A. Labia majora - from labioscrotal swellings
B. Labia minora - correct answer

6

Gender of baby can be determined starting on the ____mos of pregnancy using the ultrasound

3rd month

7

Secondary sex characteristics are determined at
A. School age
B. Adulthood
C. Puberty

C. Puberty

8

Thelarche or breast enlargement start at what age in females

8 years old

9

Pubarche and menarche start at this age

11 years old

10

Thorarche and ovularche start at this age

14 years old

11

Diamond pubic hair
A. Male b. Female

Male- correct
Female- triangular

12

Characterized by Turner syndrome, absence of ovaries but with female external genitalia

Gonadal dysgenesis - only 1 X chromosome

13

Has XXX chromosome

Superfemale

14

An example of seminiferous tubule dysgenesis

Klinefelter's syndrome - XY with additional X chromosome

15

Genetically female but gonads are male

Female pseudohermaphroiditism

16

Congenital 17@-hydroxylase deficiency

Male pseudohermaphroiditism

17

Occurs when a patient has 46 XY chromosome but with a normal female appearance

Androgen insensitivity syndrome

18

Differentiate true precocious puberty and precocious puberty

True precocious - cerebral tumors
Precocious - adrenal tumors, Leydig and granulosa cell tumors

19

External genitalia: DHT, internal genitalia : _____

AMH

20

Determined at fertilization
A. Genetic sex
B. Genital sex
C. Gonadal sex
D. Physiological sex

A. Genetic sex

21

Phenotypic sex
A. Genetic sex
B. Genital sex
C. Gonadal sex
D. Physiological sex


B. Genital sex

22

Presence of SRY
A. Genetic sex
B. Genital sex
C. Gonadal sex
D. Physiological sex


C. Gonadal sex - correct