Review the pedigree shown in Figure 17.7 and choose the most accurate statement about the inheritance of an X-linked recessive mutation
A. For rare X-linked traits, most of the
affected individuals are males.
B. Daughters of affected males are always
affected.
C. The offspring of an affected male are
usually affected.
D. The sons of the sisters of affected males
will always be affected.
E. The brothers of affected males are always
affected.
A
You might also like to view...
In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a _____
A) moss sporophyte B) moss gametophyte bearing both male and female gametangia C) fern sporophyte D) hermaphroditic fern gametophyte E) fern gametophyte bearing only antheridia
Pigs have digitigrade locomotion because they walk on
(a) their ankles. (b) the soles of their feet. (c) the tips of their toes, which are modified as hooves. (d) their hands and knees.
If a mutation occurred in a human such that the pharyngeal slits never formed, what do you predict would be the consequence?
A. A cleft palate would form. B. The eustachian tubes would not form. C. The thyroid gland would not form. D. The glottis would not form. E. The opening to the voice box would not form.
Low body temperature triggers adaptive responses to conserve heat. Once the integrating center detects that body temperature has risen, it will decrease these responses. What does this exemplify?
A. adaptation B. negative feedback C. positive feedback D. acclimatization