5. How many chromosome pairs do horses have in their somatic cells? 6. Wheat has 42 chromosomes in its diploid cell. How many chromosomes are in the haploid cells?

**5. Number of Chromosome Pairs in Horse Somatic Cells** Horses (**Equus caballus**) possess a total of **64 chromosomes** in their somatic (body) cells. Chromosomes in somatic cells are organized into pairs, with one set inherited from each parent. Therefore, the number of **chromosome pairs** in horses is: \[ \frac{64 \text{ chromosomes}}{2} = 32 \text{ pairs} \] **Answer:** Horses have **32 chromosome pairs** in their somatic cells. --- **6. Number of Chromosomes in Haploid Wheat Cells** Wheat is a polyploid organism, meaning it has multiple sets of chromosomes. In this case, wheat has a **diploid** number of **42 chromosomes**. The diploid number (2n) represents two complete sets of chromosomes, one from each parent. To determine the number of chromosomes in the **haploid** (n) cells, which contain only one set of chromosomes (typically found in gametes like sperm and eggs), you divide the diploid number by two: \[ \frac{42 \text{ chromosomes}}{2} = 21 \text{ chromosomes} \] **Answer:** Haploid cells of wheat contain **21 chromosomes**.