The number and appearance of chromosomes in a cell is called a karyotype. A karyotype can only be seen and studied with a microscope. To make karyotypes easier to understand, karyograms are often made. In karyograms, homologous chromosomes are put side by side and then arranged by size.
A zigzag stitch is a great way to seam knit fabrics. Its inherent stretch allows for the fabric to stretch and move without fear of popping a seam. On light to medium weight knits, try using a stitch length of 1.5 and a width of 5. This setting closely mimics the look and function of an overlock stitch.
How to Purl. The purl stitch differs from the knit stitch in two fundamental ways: The working yarn is held in the front of the project instead of the back, and the needle is inserted from the back to the front instead of from front to back. Hold the needle with cast-on stitches in your left hand.