(60 points). darwin spots a population of birds on the isle of yd, 15 are black and 15 are white. darwin comes back 30 years later, and there are 20 black birds and 20 white birds on the island what term would best describe this gene pool

Need asap plz hurry im being timed when a body cell divides through the process of mitosis, the chromosomes in the daughter cells a. represent only the healthiest chromosomes from the parent cell. b. represent only half of the chromosomes in the parent cell. c. are identical to the chromosomes of the parent cell. d. are formed when chromosomes from the parent cell cross over.