1. What is the chromosome number found in a human body cell? 2. Every body cell of a fruit fly has 8 chromosomes. How many chromosomes does an egg cell of a fruit fly have?

1. **Chromosome Number in Human Body Cells:** Human body cells are **diploid**, meaning they contain two sets of chromosomes—one set inherited from each parent. The total number of chromosomes in a human body cell is **46**, organized into **23 pairs**. - **Diploid Number (2n):** 46 chromosomes - **Homologous Pairs:** 23 pairs 2. **Chromosome Number in a Fruit Fly Egg Cell:** Fruit flies, specifically *Drosophila melanogaster*, have a **diploid chromosome number of 8** in their somatic (body) cells. When it comes to gametes (sex cells), such as egg cells, the cells are **haploid**, meaning they contain half the number of chromosomes found in diploid cells. - **Diploid Number (2n):** 8 chromosomes (in body cells) - **Haploid Number (n):** 4 chromosomes Therefore, a **fruit fly egg cell** contains **4 chromosomes**. **Summary:** - **Human Body Cell:** 46 chromosomes - **Fruit Fly Egg Cell:** 4 chromosomes