[单选题]
The micrograph shows an oocyte after the first
m h c4xz.gl quf0b:6n.:nze.x h2 fw1q)t0q t lq5o:o-rf:tuqovnn 0)meiotic division. This results in the formation of one large cell and one small cell. What is the fate of
ntrlfofu- ) qqo0:hw0 q2t: 5)vt n1oq the large cell?
A. It degenerates and dies.
B. It undergoes mitosis.
C. It secretes the hormone human chorionic gonadotropin (hCG).
D. It becomes a gamete.
参考答案:
D
本题详细解析:
The small cell is the polar body and the large cell is the primary oocyte which will divide by meiosis again and become the gamete. Choice D is correct.
Choice A is incorrect as the small cell (polar body) degenerates and dies, not the large cell. Choice B is incorrect as the large cell divides by meiosis, not mitosis. Choice C is incorrect, as hCG is a hormone that is secreted by the fertilized embryo.
