Prezygotic mechanisms lead to reproductive isolation by preventing the formation of
A. mating pairs.
B. fertile eggs.
C. fertile sperm or pollen cells.
D. somatic cells.
E. hybrid zygotes.
E. hybrid zygotes.
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A person who is homozygous recessive for this defective gene often suffers from severe
pancreatitis, which can be deadly. A treatment that replaces this gene is __________.
a. gene therapy b. genomics c. therapeutic cloning d. a genetic marker
Movable bones are features of the sense organs
associated with a. sight. b. hearing. c. taste. d. smell. e. touch.
Suppose that a patient presents the following symptoms: anemia, dilation of heart, lung damage and pneumonia, rheumatism, abdominal pain, and kidney failure. After learning about the patient's family history, which disorder did the doctor run a genetic test for?
a. cystic fibrosis b. albinism c. sickle cell disease d. achondroplasia
Dermatophytes, which live on the surface of the skin, are always pathogenic.
Answer the following statement true (T) or false (F)