Why do you think females are typically the carriers of sex-linked traits, but those traits are not expressed?
cystic fibrosis (cf) is an autosomal recessive disease. jane and john do not have cf but are worried about having a child who will have it, because john had a brother with the disease. while meeting with a genetic counselor it was determined that john’s parents were not affected with cf, yet his brother had it. what is immediately known about the genotypes of john’s parents? is the genotype of john immediately known? under what circumstances could john and jane have a child with cf?

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a

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.

Which of the following is most likely the result of an organism having lipids in its body a) water cannot be absorbed through the surface of a leaf b)human eats fruits to get a quick source of energy c) a sheep sleeps for more hours in the winter d) a warm river is filled with fish and algae