What process occurs when chromosomes are in a tetrad of
sister chromatids?
A. The chromosomes exchange portions of their
DNA through crossing over.
B. The chromosomes combine into one long
strand for fertilization.
C. All the genetic information is segregated, so it
does not mix in the chromosomes.

Select the correct answer. a chestnut-colored horse mates with a white-colored horse to produce a brown and white spotted offspring. what is the type of inheritance pattern?

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

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.