question_answer

A new species is formed when:

A) An individual with a new genotype is formed due to exchange of chromosome segments   during   crossing-over   in gametogenesis.

B) Genotypic changes accumulate in a population resulting in its reproductive isolation.

C) Variants with new phenotypes are produced due to new combinations of genes during reproduction.

D) Homologous chromosomes exchange segments   during   crossing-over   in gametogenesis.