instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Answer: four
answer:
How many valence electrons does carbon have?

question:
Passage: In sexually reproducing organisms, parents pass a copy of each type of chromosome to their offspring by producing gametes. When gametes are fertilized and form offspring, each has a unique combination of chromosomes and genes from both parents. The inherited gene combination determines the characteristics of the offspring. Answer: chromosome
answer:
In sexually reproducing organisms, parents pass a copy of each type of what to their offspring by producing gametes?

question:
Passage: Biotechnology has been used to create transgenic crops. Transgenic crops are genetically modified with new genes that code for traits useful to humans. The diagram in Figure below shows how a transgenic crop is created. You can learn more about how scientists create transgenic crops with the interactive animation "Engineer a Crop: Transgenic Manipulation" at this link: http://www. pbs. org/wgbh/harvest/engineer/transgen. html . Answer: transgenic
answer:
What is the term for crops that are genetically modified with new genes that code for traits useful to humans?