Question 49
Copy and complete the sentences. Choose from chromosomes, DNA, four, genes, two. You can use each word once, more than once or not at all.
1. The nucleus of every cell contains several long threads, called ___.
2. In most cells, there are ___ copies of each thread.
3. Each thread contains many ___.
4. The threads are made of a chemical called ___.
1. The nucleus of every cell contains several long threads, called ___.
2. In most cells, there are ___ copies of each thread.
3. Each thread contains many ___.
4. The threads are made of a chemical called ___.
