With Linkage Maps

question 18

Multiple Choice

With linkage maps,

• A) distances between genes are determined by sequencing the number of nucleotides between genes.
• B) the greater the number of cM between genes, the less likely crossing over will occur between them.
• C) map units are equal to twice the frequency of crossing over.
• D) genes which are closer together show less crossing over between them than those that are farther apart.
• E) only the relative order of genes is important; the distances are not.

---

Definitions:

Malleus

The malleus is a small bone in the middle ear that transmits sound vibrations from the eardrum to the inner ear.

Lacrimal Fluid

The clear, watery fluid produced by the lacrimal glands in the eyes; it's commonly known as tears, serving to lubricate and protect the eye.

Lower Palpebrae

The lower eyelid, playing an essential role in protecting the eye from debris and aiding in tear distribution.

Cranial Nerve IX

Also known as the Glossopharyngeal nerve, it is responsible for taste sensations in the posterior one-third of the tongue and contributes to swallowing.