Complementary nature of structure and function.
The present is the key to the pats because what you have done in the past is what has now brought you to where you are now, it was the stepping stones
Let 'A' denote the dominant allele and 'a' denote the recessive allele. The heterozygous cross will involve a cross between Aa and Aa i.e, Aa x Aa. The image shows the cross using a Punnett square to give an idea about the resultant offspring genotypes. The resultant offspring will have 3 dominant phenotype (yellow colored) and 1 recessive phenotype. Thus the probability of the dominant phenotype in the offspring is 75% or 3/4.
Macrophages are a type of the White Blood Cells that is a part of the immune system of the body. Macrophages are the first line of defence. They engulf the foreign bodies, foreign particles, cancerous cells and infected cells. They do it by searching for a protein marker on the surface of these foreign bodies. When the marker is absent they attack these bodies by performing phagocytosis.
Langerhans cells present on the skin are specialised macrophages that form the first line of defence.