Refer to the figure showing oogenesis. From this figure, one can conclude that the diploid number of chromosomes of this organism is _______, and the first cells shown that are haploid are the cells labeled _______.

Question

Refer to the figure showing oogenesis.  From this figure, one can conclude that the diploid number of chromosomes of this organism is _______, and the first cells shown that are haploid are the cells labeled _______.

Quizplus · Accepted Answer

From the figure, we can see that each primary oocyte contains 4 replicated chromosomes, indicating a diploid number of 2n = 4. The first cells shown that are haploid are the secondary oocyte and the polar body labeled 2 and 3, which each contain only 2 replicated chromosomes (haploid number of n = 2). Therefore, the best choice is B, with a diploid number of 2n = 4 and the haploid cells labeled 2 and 3.

Refer to the Figure Showing Oogenesis