Three genes at three loci are being mapped in a particular species. each has two phenotypes, one of which is markedly different from the wild type. the unusual allele of the first gene is inherited with either of the others about 50% of the time. however, the unusual alleles of the other two genes are inherited together 14.4% of the time. which of the following describes what is happening?

a. the genes are showing independent assortment.
b. the three genes are linked.
c. the first gene is linked but the other two are not.
d. the first gene is assorting independently from the other two that are linked.
e. the first gene is located 14.4 units apart from the other two.

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

Nerve cells are specialized to respond to stimulitrue or false?

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.