How did the work of watson, crick, and franklin in the 1950s lead to today’s biotechnology and genetic engineering?
their discovery of how genes pass on traits scientists learn to manipulate genetic material.
their development of vaccines led to longer life spans and many medical breakthroughs.
their invention of the double helix allowed scientists to learn to clone plants and animals.
their discovery of genes scientists to develop bioengineering.

Their discovery of how genes pass on traits helped scientists learn to manipulate genetic material.

Explanation:

Watson, Crick, and Franklin were noble prize winners in Physiology or Medicine because using X-ray crystallography they were able to determinate the structure of DNA. Because of that, they were able to learn that the genes carry parts of traits from our parents and then they learned how to manipulate genetic material.

so what is your question?

the three roles stated in the dialogue develop the siblings' personalities.

lloyd's personality looks like a trademarketer

dana's personality is afraid from lloyd's behavior and the oldest sister is a decided person who tries to solve any conflict