Reproductive Genetics

Creating males is costly, why parthenogenetic species are producing them? Most animals have female and male genders. Considering the investment of energy required for sexual reproduction, it is interesting to know why this strategy has been conserved during evolution in some species. The effort that goes into mating result in less reproduction. Moreover, meiotic recombination entails important inherent risks in terms of genomic instability, and the creation/production of separate sex, with specific genetic and physiological features distinct from the female, may be regarded as a burden for the evolutionary success of the species.

Figure 1. Different stages of human embryos treated with CRISPR-Cas9 technology (1). Genetic modifications are still seen with both excitement and reticence by the general population. This poses a challenge, being scientists and media responsible for the information available to the public. Besides GMOs (genetically modified organisms) for industry or food, the last decade has witnessed a growing interest in genetic modifications and genome-editing techniques applicable to humans. So, it is important to note that people who are not specialists in the…