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.
2. Double needle. To achieve a more professional-looking hem without professional equipment, turn up the hem and sew with a double needle (also called a twin needle) from the right side of the fabric. The bobbin thread will zigzag between the parallel stitches, resulting in a stretchier hem.. The nature of the zigzag stitch allows the thread to stretch with the fabric. Turn the hem up the desired amount, then use a zigzag stitch to secure it. A narrow zigzag stitch is less noticeable.