A couple wants to have a child but they are concerned that that child might have cystic fibrosis. After
taking a family history, you determine that neither of the two people have the disease, but one of them
(the female) had a sister with cystic fibrosis and the other (the male) had a dad with it. What do you
tell them?
What will be an ideal response?
The male must be a carrier since he is not sick, but his father had the disease and had to give him the
recessive allele. The female has a sister with the disease which means both her parents are carriers.
The likelihood that she is also a carrier then is 2/3. If both she and her partner are carriers, the chance
of having a child with cystic fibrosis is 1/4 times the woman’s 2/3 chance of being a carrier, or 2/12
(1/6).
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Which of the following statements about osmoregulators is false?
A. They are restricted to environments with stable solute concentrations. B. Some organisms can switch between acting as an osmoconformer and an osmoregulator depending on environmental conditions. C. An osmoregulator uses more energy to control body fluid solute levels than an osmoconformer. D. The osmotic pressure between the inside and outside of internal cells is usually similar. E. Animals that maintain body fluid solute concentrations that are higher than that of the external environment and animals that maintain body fluid solute concentrations that are lower than that of the external environment are both considered to be osmoregulators.
The fungal diseases that are acquired the airborne route typically stay localized to the lungs, causing pneumonia.
Answer the following statement true (T) or false (F)
In prokaryotes that carry out aerobic respiration, the ________ serves the same purpose as the inner mitochondrial membrane and the ________ serves the same purpose as the mitochondrial matrix
A) ribosomes; plasma membrane B) cytoplasm; plasma membrane C) cytoplasm; cell wall D) cytoplasm; nucleoid E) plasma membrane; cytoplasm
Temperature extremes, lack of water, and other environmental stresses trigger an increase in ____ synthesis, release, and transport, which helps the plant survive the adverse conditions.
A. cytokinin B. gibberellin C. auxin D. abscisic acid E. ethylene