Look at the pictures and do the puzzle. What is the mystery word?

1. The first picture shows three tulips, two are red and one is a sketch. The clue is 'He's'.

2. The second picture shows a man lifting weights. The clue is 'He's'.

3. The third picture shows three tulips, two are red and one is a sketch. The clue is 'They're'.

4. The fourth picture shows three tulips, two are red and one is a sketch. The clue is 'They're the'.

5. The crossword has 'G' in the first square of the vertical word. The horizontal words are 'He's', 'He's', 'They're', 'They're the'. The vertical word starts with 'G'. The word 'Genes' fits the context of science and the crossword. The mystery word is Genes.