An allele is:
a) a version of a gene.
b) a trait that can be affected by the external environment.
c) always codominant to its counterpart in another chromosome.
d) the result of a change in phenotype.

Why do you think the puppy litter was all dark-haired?

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?

Differentiate renewable and nonrenewable resources