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Anatomy

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Embryology

Question
3 out of 50
 

Which of the following statements is incorrect concerning the process of oogenesis (LQ)

 

 
A Primordial germ cells arise from epiblast during 2nd week
B Primordial germ cells arrive at the genital ridge at week 5 and remain dormant until puberty
C Primary oocyte (2n) undergoes meiosis to produce haploid (n) secondary oocyte
D In a female child at birth oocyte is at prophase-I
Ans. B

Primordial germ cells arrive at the genital ridge at week 5 and remain dormant until puberty

Pg. 13, Langman embryology (Ed 11th)

The statement applies to male PGCs& testes and not to ovary.

In males the PGCs arrive in the testes by the end of week 5 and remain dormant till puberty. Only at puberty the actual process of spermatogenesis will be initiated.

In the ovary the PGCs initiate oogenesis even before birth. At birth there are no viable PGCs in the ovary, they have already got converted into primary oocytes.

Embryology Flashcard List

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