Which of the following is NOT a characteristic of sexual reproduction?

Sexual reproduction is defined by several key characteristics, one of which is the exchange of genetic material between two parents. This process generally entails the formation of gametes—sperm and eggs—that combine during fertilization to create offspring. The result is typically genetically diverse progeny, as the offspring inherit a mix of traits from both parents, leading to variations that can be advantageous for adaptation and evolution.

The option stating that sexual reproduction occurs without any genetic material exchange directly contradicts one of the fundamental aspects of this reproductive strategy. In sexual reproduction, the entire premise is based on the combination of genetic information from two individuals, making this option incorrect in the context of defining sexual reproduction.

Thus, the characteristic that is not true about sexual reproduction is indeed the one that suggests a lack of genetic exchange, highlighting the necessity of both genetic input from parents and gamete formation in this type of reproduction.