Genetic variation, provided through sexual reproduction, offers more opportunity for offspring to survive in changing environments. what two aspects of meiosis provide sources of such variation? a. mutation and fertilizationb. crossing over and allelic exclusionc. segregation and independent assortmentd. crossing over and independent assortment of chromosomes

Option D.

Explanation:

Crossing over is an important characteristic of meiosis which provides the genetic variation and various allelic combinations present in the offspring. Hence the answer is option D.

gold i'm pretty sure i might be wrong

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.