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 following types of epithelial tissues are covered in this activity: 1. Simple squamous epithelial tissue (lungs) 2. Simple cuboidal epithelial tissue (kidneys) 3. Simple columnar epithelial tissue (small intestine) 4. Pseudostratified (ciliated) columnar epithelial tissue (trachea lining) 5.Stratified squamous epithelial tissue (mouth lining) 6. Stratified cuboidal epithelial tissue (salivary glands, sweat glands) 7.imple cuboidal epithelial tissue (kidneys) 3. Simple columnar epithelial tissue (small intestine) 4. Pseudostratified (ciliated) columnar epithelial tissue (trachea lining) 5. Stratified squamous epithelial tissue (mouth lining) 6. Stratified cuboidal epithelial tissue (salivary glands, sweat glands) 7.