Official Guid to MCAT Q39 on Bio

[nr6unhH]

---

Members don't see this ad.

39. Of postpubescent human male and female reproductive organis, in which, if either, do the germ cells regular undergo mitosis to produce daughter cells that go on to become gametes?
A. In male reproductive organs only
B. In female reproductive organs only
c. In both male and female
D. In niehter male or female

answer is A.

* There is such a strong association b/t gametogenesis and meiosis that it is easy to overlook that germ cells must first divide by mitosis in order to replenish the germ cell population while simultaneously providing cells that can differentiate into gametes.

<- can someone clarify this for me?
thanks!

 

[G1SG2]

39. Of postpubescent human male and female reproductive organis, in which, if either, do the germ cells regular undergo mitosis to produce daughter cells that go on to become gametes?
A. In male reproductive organs only
B. In female reproductive organs only
c. In both male and female
D. In niehter male or female

answer is A.

* There is such a strong association b/t gametogenesis and meiosis that it is easy to overlook that germ cells must first divide by mitosis in order to replenish the germ cell population while simultaneously providing cells that can differentiate into gametes.

<- can someone clarify this for me?
thanks!

In the ovary of a female embryo, germ cells undergo mitosis to generate large amounts of oogonia, which then enter the first phase of meiosis and are arrested in prophase I (primary oocytes). Mitosis ceases before birth. That is to say, at birth, a female has all the eggs she will ever need throughout her entire lifetime. This supply is NOT replenished, whereas in males, mitosis does continue throughout the lifetime.