When a single-gene mutation can have phenotypic effects at multiple stages of development, it is
A. pleiotropic.
B. incompletely dominant.
C. recessive.
D. causing a disease.
E. codominant.
A. pleiotropic.
You might also like to view...
Which of the following is capable of dephosphorylating molecules?
A. phospholipase C B. protein kinase A C. Grb2/Sos/Ras complex D. phosphatase E. IP3
In vertebrates, the main function of the urinary system is to____
a. rid the body of excess water b. rid the body of unwanted solutes c. conserve excess water d. rid the body of excess water and unwanted solutes e. rid the body of solid wastes
Sickle-cell anemia is caused by a recessive mutation in the hemoglobin gene. However, heterozygote individuals also show a small percentage of sickled red blood cells. What type of inheritance pattern is this an example of?
A) Polygenic inheritance B) Sex linked C) Chromosomal nondisjunction D) Incomplete dominance
The gene that codes for the number of fingers on the human hand has two alleles—five fingers and six fingers. The letters F and f are used to represent this trait. Having five fingers is the recessive trait. A woman has six fingers, but one of her parents has five fingers. She marries a man who has five fingers. What is the probability that they will have a child who is homozygous dominant for this trait?
a. 0 percent b. 25 percent c. 50 percent d. 100 percent