1 If the black lines aren't visible on the external screen, the laptop screen may need to be replaced. 2  If the black lines are also visible on the external screen, the video card or motherboard may need to be replaced. 3  In some cases, a loose video card can cause problems with the monitor video.
1. segmentation - (embryology) the repeated division of a fertilised ovum. cleavage. embryology-the branch of biology that studies the formation and early development of living organisms. cell division, cellular division-the process in reproduction and growth by which a cell divides to form daughter cells.
The term ' segmentation gene ' is a classification given to a broad class of genes that are further subdivided into three smaller classes of genes. Within the segmentation gene group, there are gap genes, pair-rule genes and segment polarity genes.They control development in this order.These segmentation genes control the development of segments, or small repeated regions of a body that make up specific structures. If you were to look at a fly embryo during development, you'd quickly notice these segments along their bodies.hey control development in this order. These segmentation genes control the development of segments, or small repeated regions of a body that make up specific structures. If you were to look at a fly embryo during development, you'd quickly notice these segments along their bodies.