Question

2) A location on a specific chromosome that has appreciable variation in a population is called __________________________.

Select one:

A) a chromosomal arm.

B) an inherited disease.

C) a DNA polymorphism.  

D) phenotypic variation.

E) a homologue.

3) In the DNA barcoding of animals, a portion of the cytochrome oxidase 1 gene (cox-1) is used. Why?

Select one:

A) The gene sequence varies little among members of a species, but varies more among different species.

B) The cox-1 gene encodes surface features of animals, allowing their identities to be established by visual inspection.

C) There is little variability in the cox-1 gene among different animal species, so the gene is a reliable marker of “animalhood”.

D) The sequences flanking the cox-1 gene are different in different animal species.

E) The cox-1 gene is found in some animals, but not in others.

Answer 1

solo AC a DNA polymorphism Explanation. It shows continuous variation in the population and locate on a specific chromosome. 3) A The gene sequence varies little among members of a Species but varies mare among different Species Explanation's cox-) gene is used to identify the individuals of same species, and distinguish them from different species