___ is when homologous chromosomes exchange equivalent sections of their chromatids.

Transcription
Crossing-over
Synthesis
Replication

the animal that would be cutest if scaled down to the size of a cat? elephant

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.