Females have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size. The other two chromosomes, X and Y, are the sex chromosomes. This picture of the human chromosomes lined up in pairs is called a karyotype.In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females.emales have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size. The other two chromosomes, X and Y, are the sex chromosomes. This picture of the human chromosomes lined up in pairs is called a karyotype.
In the book Carrots Love Tomatoes it says Don't plant tomatoes near corn because the tomato and corn earworm are identical..
Corn can be grown in any region. When the corn is about 6 inches tall, thin short varieties to two feet apart and tall varieties to three feet apart. Although corn can be grown closer together than this, the roots are then more crowded and more watering and feeding are needed. Corn is a heavy user of nitrogen. Fertilize in the spring, again when the corn is 8 inches tall, and again when the plants are 18 inches tall. Side-dress between the rows, using one-third of a pound of complete, well-balanced fertilizer on each side of a 10-foot-long row. Hill soil around the plant roots at this time to help support the stalks.