CSS Zoology Questions & Answers

Q.  A new species is formed when:

a. An individual with new genotype is formed due to exchange of chromosomal segments during crossing over in gametogenesis
b. Genotypic changes accumulated in a population which result in its reproductive isolation
c. Variants with new phenotypes are produced owing to new genetic combinations occurring during reproduction
d. Homologous chromosomes exchange segments during crossing over in gametogenesis


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