Current location - Training Enrollment Network - Mathematics courses - (20 13? It is known that A and A are a pair of alleles. For example, ① ~ ③ represent three geographically isolated populations of an animal.
(20 13? It is known that A and A are a pair of alleles. For example, ① ~ ③ represent three geographically isolated populations of an animal.
A. According to the picture, the smaller the population, the greater the influence of gene loss on gene frequency. Therefore, the description of A is incorrect.

B, according to the title map, ② In125th generation, the gene frequency of A is 75%, that of A is 25%, and that of aa is 25% × 25% = 6.25%. So b is wrongly described.

After C, 150 generations, the gene frequencies of the three populations are quite different, and reproductive isolation may occur, so C is described correctly.

D. According to the title map, with the increase of population algebra, the frequency of 3A gene is almost unchanged, so the description of D is wrong.

So, C.