In an inherited form of high cholesterol, rr individuals have a blood cholesterol level greater than 500 mg/dL, Rr individuals are near 300 mg/dL, while normal (RR ) cholesterol levels should be less than 200 mg/dL. The R allele is ___ to the r allele. a. Codominantb. Dominantc. Recessived. Homozygouse. Incompletely dominant

a. Codominant

Explanation:

The R allele is codominant to the r allele.

In codominance, the two alleles that make up a trait/gene exert equal effects on each other and therefore contribute equally to the phenotypic expression of the trait.

r in homozygous state conditions a blood cholesterol level that is greater than 500 mg/dl.

R in homozygous state conditions a blood cholesterol level that is less than 200 mg/dl.

Heterozygous condition, Rr conditions a blood cholesterol level near 300 mg/dl.

Hence, r and R exerted equal effects on each other which neither being dominant nor recessive. A clear-cut case of codominance.

The correct option is a.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.