A dominant gene will always be expressed when present, such as in the homozygous dominant genotype (RR), or heterozygous genotype (Rr). A recessive allele is only expressed wh â¦ en the genotype is homozygous recessive (rr).
(Lung alveoli, in contrast, are lined by very thin simple squamous epithelium .). Pseudostratified respiratory epithelium consists primarily of columnar ciliated cells. Ciliary beating sweeps mucus and the dust it carries up the bronchi and trachea toward the pharynx, where it can be swallowed.
The type of epithelial cells lining the small and large intestines  are simple columnar. However, at the inferior part of the rectum,  it changes to stratified squamous epit â¦ helium. 1 person found this useful.plit and merge into it. Answer by Nithya Venkat. Confidence votes 414. Enjoy living life on Planet Earth! Transitional epithelium lines the lumen of the ureter. The transitional epithelium is a type of tissue that has multiple layers of epithelial cells that can contract and expand.